Previous Page Table of Contents Next Page


Annexes

Annex 1 - Part 1
Farmer questionnaire

Completed by.....................................................................................

Date...................................................................................................

Name of farmer..................................................................................

Location of farm.................................................................................

Brief description of the farm...............................................................
...........................................................................................................
............................................................................................................

Resources

Area of farm.....................................................................................................
.........................................................................................................................
................................................................................

(total, farmed, irrigated)

Equipment used?..............................................................................
..........................................................................................................
..........................................................................................................

Access to water................................................................................
..........................................................................................................
..........................................................................................................

(distance from farm, irrigation techniques)

Inputs (seed, fertilizer, herbicides) purchased and from where purchased......
............................................................................................................................
............................................................................................................................
............................................................................................................................
.......................................................................................................................

How many people work on the farm?.................................................................
............................................................................................................................
...................................................................................................................
.........................................................................................................................

(self, family and any hired workers)

Production

What are the main crops grown for sale?..............................................
...............................................................................................................
................................................................................................................
................................................................................................................
................................................................................................................

(identify the main crops actually sold, rather than consumed, and the percentage of total output represented by market sales)

What are the main production problems faced?.......................................
...................................................................................................................
...................................................................................................................
...................................................................................................................
...................................................................................................................

Marketing

How are crops/products sold?...........................................................
...........................................................................................................
...........................................................................................................
...........................................................................................................
...........................................................................................................

(visit by trader to farm, taken to local market or major market, etc.)

How does the farmer decide what prices to ask for?........................
...........................................................................................................
...........................................................................................................
...........................................................................................................

What are the main problems with marketing?...................................
...........................................................................................................
...........................................................................................................
...........................................................................................................

Who are the most important buyers of each product locally?...........
...........................................................................................................
...........................................................................................................
...........................................................................................................

What improvements would you like to see made to marketing arrangements?
...........................................................................................................
...........................................................................................................
...........................................................................................................
...........................................................................................................

Annex 1 - Part 2
Farmer marketing arrangements

Product.............................................................................................
..........................................................................................................

(identify product for more detailed investigation)

Product information

Total yield.........................................................................................

How much of your total production is sold?.....................................

Volumes sold annually?...................................................................
.........................................................................................................
.........................................................................................................

(increasing or decreasing sales)

Seasonal supply..............................................................................
.........................................................................................................

(start, peak and end of season by month)

Packing............................................................................................
.........................................................................................................
.........................................................................................................

(weight of produce per packaging unit, type of packaging)

Are any grading and quality standards applied?...............................
...........................................................................................................

(size, colour, moisture, variety)

Usual prices and range of prices.......................................................
...........................................................................................................
...........................................................................................................
...........................................................................................................

(average price, maximum and minimum prices, variability between season, price varies according to grade)

Costs of production? ..................................................................
...................................................................................................
............................................................................................................
............................................................................................................
............................................................................................................
............................................................................................................
............................................................................................................

(cultivation, seeds, fertilizer, irrigation, weeding and herbicides, pests and disease control, labour for seeding/planting, crop management, spraying, irrigation, harvesting, grading, packing)

Transport (for trader and farmer)

How is transport organized and carried out?.................................
........................................................................................................
........................................................................................................
........................................................................................................
........................................................................................................

What volumes are carried on each trip to the market?....................
..........................................................................................................
..........................................................................................................

...........................................................................................................

What are the costs per package used for transporting produce to the different markets?
............................................................................................................
............................................................................................................
............................................................................................................
............................................................................................................

What are the transport problems faced?...........................................
...........................................................................................................
...........................................................................................................
...........................................................................................................
...........................................................................................................

Packaging, storage and processing (farmer and trader)

Type and size of packaging material, and how much does it cost?
..............................................................................................................
..............................................................................................................
..............................................................................................................
..............................................................................................................

Storage arrangements, if any. Where, how and by whom?................
..............................................................................................................
..............................................................................................................
..............................................................................................................
..............................................................................................................
.............................................................................................................

(on farm, cooperative, farmer group, in market, by end user, type, cost)

Business

How is the crop marketed at present?...................................................
................................................................................................................
................................................................................................................
................................................................................................................

Who are the most important buyers and why?.......................................
................................................................................................................
................................................................................................................
................................................................................................................

(different types of buyers the farmer can sell to)

Which buyers have the best reputation?...........................................
...........................................................................................................
...........................................................................................................

Is there competition between buyers?...............................................
...........................................................................................................
...........................................................................................................
...........................................................................................................

Do farmers provide credit to buyers?................................................
...........................................................................................................
...........................................................................................................
...........................................................................................................

When do buyers pay?........................................................................
...........................................................................................................
...........................................................................................................

What are the main markets where produce is sold?..........................
............................................................................................................
............................................................................................................
............................................................................................................
............................................................................................................
............................................................................................................

General points

Is this crop profitable?........................................................................
...........................................................................................................

Is there opportunity for selling more products?..................................
............................................................................................................
............................................................................................................

How can the profitability of the crop be improved?............................
............................................................................................................
............................................................................................................
............................................................................................................
............................................................................................................
............................................................................................................

How do you know what price to sell your crops at?...........................
............................................................................................................
............................................................................................................
............................................................................................................
............................................................................................................
............................................................................................................

(word of mouth; market information, radio)

Annex 2
Trader questionnaire

Interviewer..............................................................................
Date...................................................................................................

Contact..................................................................................
Position..............................................................................................

Name and address of business.........................................................

Company activities.............................................................................
............................................................................................................
............................................................................................................
............................................................................................................
............................................................................................................
...........................................................................................................

(main products handled, who sells to whom, services provided such as cold storage, collection, delivery, credit, packaging, grading)

Company resources............................................................................
.............................................................................................................
.............................................................................................................
.............................................................................................................
...........................................................................................................

(Transport, cold storage, wholesale outlets, retail outlets)

Procedure for doing business.............................................................
............................................................................................................
............................................................................................................
............................................................................................................

(Are products collected or delivered by the farmer? Commission or fixed price purchases? How/when are prices agreed? Payment terms?)

Products in demand or in short supply
............................................................................................................
............................................................................................................
...........................................................................................................
...........................................................................................................

(products needed in greater volume and when, product specifications, likely prices)

Main customers.................................................................................
...........................................................................................................
...........................................................................................................

(Are sales increasing, flat or declining?)

Main difficulties as a business?.........................................................
...........................................................................................................
...........................................................................................................
...........................................................................................................
...........................................................................................................

How traders want to work with suppliers?.........................................
...........................................................................................................
...........................................................................................................
...........................................................................................................

What are the major
businesses trading in fruit and vegetables?.......................................
...........................................................................................................
...........................................................................................................
...........................................................................................................

Trader product information

Product..............................................................................................

Volumes sold.....................................................................................

(total per year)

.......................................................................................................................
.......................................................................................................................
.......................................................................................................................

(high or low monthly or weekly examples)

Estimated total size of market............................................................
............................................................................................................
............................................................................................................

(try to establish the overall volume of sales in the area, town, city, and the relationship between supply and demand)

Major suppliers..................................................................................
...........................................................................................................
...........................................................................................................
...........................................................................................................

(What are their seasonal or unique selling points and do you experience any problems with them?)

Product specifications........................................................................
...........................................................................................................
...........................................................................................................
...........................................................................................................
...........................................................................................................

(variety or description)

Grading or quality standards..............................................................
............................................................................................................
............................................................................................................
............................................................................................................
............................................................................................................

(degree of ripeness, colour, flavour, sizes, acceptable level of faults)

Packaging..........................................................................................
...........................................................................................................
...........................................................................................................
...........................................................................................................
...........................................................................................................

(type of packaging, size, net weight of produce, necessary printing)

Reasons for price variations........................................................................
......................................................................................................................
......................................................................................................................
......................................................................................................................
......................................................................................................................
......................................................................................................................

(buying, selling, range, impact of seasonality)

Typical prices per month

Jan

_______

Feb

_______

Mar

_______

Apr

_______

May

_______

Jun

_______

July

_______

Aug

_______

Sep

_______

Oct

_______

Nov

_______

Dec

_______

Factors affecting sales.......................................................................
...........................................................................................................
..........................................................................................................

Sales trend.........................................................................................
...........................................................................................................
...........................................................................................................

(Have sales been increasing, decreasing or flat over the last two to three seasons?)

Are additional/new supplies required for this crop?...........................
...........................................................................................................
...........................................................................................................

When and how much of additional supplies are required?................
............................................................................................................
............................................................................................................
...........................................................................................................

Trader's recommendations
regarding how new suppliers can become involved..........................
...........................................................................................................
...........................................................................................................
...........................................................................................................

Transport

How is transport organized and carried out?.......................................
..............................................................................................................
..............................................................................................................
............................................................................................................

Volumes and costs involved..............................................................
...........................................................................................................
...........................................................................................................
...........................................................................................................

What transport problems are experienced?.......................................
............................................................................................................
............................................................................................................
...........................................................................................................

Packaging, storage and processing

Type and size of packaging material.................................................
...........................................................................................................
...........................................................................................................
...........................................................................................................

(who owns it or who supplies it and costs)

Storage arrangements, where, how and by whom?..........................
...........................................................................................................
...........................................................................................................
...........................................................................................................
...........................................................................................................

Annex 3
A summary of marketing extension techniques

Potential activity

Marketing education

Market linkages

Coordinating activities


Pre-production activities

Market-Orientated Production
Production is based on demand for a particular quality, variety, season and packaging.

Training farmers in what the market wants in terms of product and marketing system. Using successful farmers to explain their business strategies and techniques.

-

Organizing successful farmers to meet with others.

Crop Budgets/Prices
Calculation of potential returns of different crops, and how profitability can be improved through improved marketable yield, higher prices and lower costs.

Farmer education to present alternative crops, their potential returns and how they can be improved. Use farmer meetings, or work with farmer associations or groups.

-

Farmer meetings

Input Supply
Profitability can sometimes be achieved by ensuring the provision of specialist inputs (e.g. planting material of the varieties/cultivars demanded by the market, sprays that control specific pests and diseases).

Advice, via the agricultural extension service or buyers, on improved production techniques.

-

Advising local agribusiness suppliers of needs for specialist inputs by farmers (i.e. specific varieties, particular sprays, technologies).

Finance and Credit
Farmers often need sources of production finance. Traders, formal and informal sources can supply this finance. The terms are often different.

Explaining to farmers the range and costs and benefits of alternative sources of credit, including informal credit.

-

Advising local agribusiness suppliers of needs for specialist inputs by farmers and the willingness of local financial institutions to finance these.

Investment Advice
Technology (e.g. irrigation, greenhouses or sprayers) can increase profitability.

Potential marketing and financial benefits of investment in new technology can be explained. Farmers who have introduced the techniques or technologies can give talks.

-

Advising input suppliers and local shops on the improved technology and inputs that farmers will want to buy. Organizing farmers to explain their technologies to others.


Post-harvest and distribution

Harvesting
Best practices on when to harvest, how to harvest and reduce losses and how to maintain quality.

Farmer training and practical demonstrations.

-

Planning training.

Grading, Packing and Storage
Grading and storage can improve prices, while packing can also help reduce damage and improve prices.

Farmer and trader training and practical demonstrations. The provision of information on grading and packing standards.

-

Ensuring that packing material is available from local sources. Working with local manufacturers of packaging.

Transport and Distribution
Access to transport services can give farmers greater control over the marketing of their produce.

Working with farmers to consider ways of reducing costs. Providing lists of transporters and indications of typical costs.

-

Organizing farmers and transporters to develop lower-cost, more-reliable transport connections through load consolidation, regular collections, etc.


Marketing and selling

Linking buyers with sellers
Buyers and sellers are dependent on each other. Buyers welcome both new and potentially better sources of supply, while sellers will want to explore possible new outlets for their produce.

Explaining to farmers how the marketing chain works and how it is changing. Providing lists of buyers and their contacts.

Organizing for traders to meet farmers and farmer groups. Helping traders, exporters and farmers to research and identify marketing opportunities.

Facilitating meetings, through trade fairs, outward seller missions, and inward buyer missions.

Improved communication in the marketing chain
When the different links in the marketing chain know each other, communicate well and co-ordinate activities, the process becomes more efficient and they are likely to become more effective at buying produce and circulating money into the rural economy.

Using training to explain to farmers and traders each others' needs, requirements and activities.

-

Creating opportunities for buyers and sellers to meet, discuss and develop ways of increasing sales and overcoming constraints (e.g. at workshops, seminars, training sessions). Much of the important discussion will happen informally between farmers and traders.

Establishing collection centres, local markets, village markets and assembly markets
Creating local markets to consolidate products in one place and at one time attracts buyers and sellers.

Explaining to farmers the need for a local market and gaining their support.

Explaining to traders the need for a local or assembly market and encouraging traders to attend local markets.

Identifying the market's location. Liaising with the authorities to provide services. Agreeing the dates/timing of the market. Advising farmers and traders of when it will occur. Supporting the market during the early days.

Working with farmer groups, farmer associations and cooperatives
If managed efficiently a group of farmers can be very successful in marketing their products because of economies of scale and negotiating strength.

Discussing and developing with farmers a strategy for improving the marketing of their products. Identifying potential trading partners for the groups

Enabling representatives of the farmer group to negotiate supply contracts with traders.

Supporting the first few trades so that misunderstandings can be resolved and disputes overcome.

Working with agribusiness
With increased processing the opportunities for supplying the agribusiness sector will generally expand as economies develop.

Helping farmers to understand alternative contract terms.

Making introductions between the farming sector and agribusiness.

Ensuring that the farmers and the agribusiness activities are coordinated and that problems, misunderstandings and disputes are resolved.

Contracts
Processors and major agribusinesses often want to contract production to secure supply. This is useful to help improve income security.

Helping farmers to understand alternative contract terms.

Assisting farmers with contracts by providing advice on typical terms.

Linking farmers and farmer groups with agribusiness.

Negotiating and selling
Prices received often depend on the negotiation skills and strengths of farmers.

Guiding farmers on how the market operates (supply and demand), negotiation techniques and typical price ranges.

Assisting farmers in negotiating with new suppliers by identifying potential customers for farmers and providing guidance on buying terms.

Providing information to farmers on where they can obtain market information and can contact buyers.

Using market information
This includes official, unofficial and informal sources of information, which can help farmers to understand the market. Short-term information helps with decisions on selling while market information over the longer term can influence planting decisions.

Training farmers in how to use and interpret information. Emphasizing the importance of farmers gathering information themselves.

Encouraging farmers to contact traders to obtain market information and prices.

Organizing dissemination of government price information. Providing information to farmers on contacts, markets, products and prices.

Building up new trading activities
Sales to new buyers or of new products provide opportunities for growth but problems can also occur.

Planning with farmers a sensible approach to developing sales. Identifying new market opportunities for traders.

Providing samples to interested buyers. Carrying out test marketing to the most promising traders.

Providing on-going support during the early stages of trading to help overcome disputes and misunderstandings. Assisting with market research.

Value-added enterprises
With development, opportunities often emerge for value-added products(e.g. snacks, dried fruit).

-

Linking processors with potential trading partners.

Organizing training and linkages with those that can supply the technology.

Crop Development
There will be opportunities for more profitable crop production through the use of different or new technology and through new crop introductions.

-

-

Organizing for crop research and development trials to take place and using these for demonstrations to farmers.

Project linkages
Opportunities often exist to work with development projects.

-

-

Attract financial and technical support to the area by presenting its opportunities and needs to government, NGOs and international organizations.

Infrastructure
The building of roads, bridges and the development of market sites can all be fundamental to economic development.

-

-

Lobbying local and national authorities for investment and support.

Training of Agricultural Officers
Most agricultural officers have had little training in marketing as a tool for development.

Providing courses to senior managers, trainers, researchers and extension officers so that they can appreciate the importance of marketing.

-

-

Annex 4 - Part 1
A summary of post-harvest handling issues

Post-harvest handling requires extensive study to be fully understood. This guide only covers some basic principles.

Use publications listed in "Further reading" at the end of this guide to obtain more information.

Production influences on shelf life
(quality and a long shelf life start with production)

Factors that influence shelf life are:

Major causes of crop losses

· Water loss

Plants consist of 65-85% water. Once harvested there is no replacement of water lost. The larger the surface area (e.g. with leafy vegetables) the greater the potential water loss. When 5 to 10% is lost the product visibly wilts and is unsaleable.

· Mechanical damage

This happens at harvesting or results from bad handling. Skin breakages, crushing and bruising all lead to physiological damage and disease infection.

· Physiological damage

When a harvested plant, or part of a plant, is wilted, damaged or attacked by a disease or pest then chemical reactions that can cause unpalatable flavours can occur within the plant tissue. Plant material rapidly ages without fresh water and foods from photosynthesis.

· Disease damage

Damage, whether from bad handling or pest attack, increases the likelihood of attack from a disease, as does moisture on the surface of the produce, which can lead to fungus development.

· High temperatures

The higher the temperature, the greater is the moisture loss. As a result, disease infection will be speedier and the shelf life shorter.

Techniques for reducing crop damage and extending shelf life

· Reduce water loss

Harvest crops when they are well watered; keep them in high humidity, reduce air flow, keep produce cool. The curing of some products (e.g. drying the neck and outer skin of onions, allowing potatoes and yams to develop a thicker skin under warm humid conditions) reduces moisture loss.

· Do not damage

Cut don't pull; hold in the palm not with the fingers; don't drop, be gentle and always handle with care.

Pack in boxes without sharp edges.

Use shallow boxes.

Ensure that there is no excessive weight of produce on top of other produce.

Make sure that the fruit does not stick out above the top of the box and get crushed.

Boxes can collapse or become weakened if too many are stacked on top of each other (especially wet cardboard boxes).

Drive carefully on poor roads.

For valuable crops use cushioning inside boxes

(e.g. trays, paper).

· Minimize physiological damage

Keep produce cool, turgid and undamaged.

· Minimize diseases

Discard diseased and damaged fruit; if necessary treat produce with fungicide; avoid damage; allow sufficient airflow to prevent moisture collecting on the surface of the fruit and vegetables. Keep field boxes clean and do not let produce touch the ground.

· Above all keep the produce cool

Harvest when the produce is cool (i.e. in the early morning)

In the field protect the produce from the sun with a damp cloth. Remove from the sun as soon as possible, store under shade.

· When refrigerating

Remove the field heat as quickly as possible and reduce to storage temperature (n.b. every hour that cooling is delayed reduces the maximum shelf life by 10 hours). If produce is refrigerated it MUST be kept in a cool chain until sale, or else moisture will develop on the surface of the produce.

· When not using refrigeration

Keep produce in a cool, dark, humid location.

Harvesting

· Avoid mechanical damage to produce at all times. Keep produce clean, out of the sun and avoid contact with the soil.

· Harvest when produce is cool and not wet (e.g. from dew, rain or irrigation).

· Root crops have less damage when grown on raised beds.

· Leafy vegetables should be snapped by hand.

· Cabbage and lettuce should be cut and trimmed with a knife.

· Loosen bulbs with a digging fork before harvesting.

· To harvest cauliflower and broccoli, cut with a knife.

· Fruit should ideally be cut or, if ripe, 'lift, twist and pull', holding the fruit in the palm of the hand.

· Mature green fruit or fruit with a wooden stalk should be clipped.

· Immature fruit with a fleshy stem (e.g. okra, zucchini, capsicum, and papaya) can be cut with a knife.

· Harvesting bags allow both hands to be free and reduce fruit damage.

· Small plastic buckets are suitable for produce that could be crushed (e.g. tomatoes and beans).

· Bulk bins are used for large-scale transportation of products like citrus, apples and cabbages.

· Transport carefully and slowly over bumpy roads.

Optimium timing of harvest

· Cabbage

Harvest when the head has formed tightly, before the outer leaves start to die or the head shows any sign of splitting. At the correct stage of maturity, freshly harvested cabbage heads should squeak when rubbed together.

· Cantaloupe melons

The fruit should separate easily from the plant. If only part of the stem pulls off then the fruit is not ripe and will never ripen to a full flavour.

· Honeydew melon

Harvest when the fruit is well filled out, there is just a hint of green and the surface is covered with fine hairs.

· Bananas

For export, or sales in distant markets, harvest when still green and only at between three-quarters full (80 days from shooting) to high three quarters (90 days from shooting). The longer the period of transport the thinner the fingers should be at the time of cutting. For local marketing the fruit is harvested when fully mature but before ripening has started.

· Pineapples

For local consumption or canning, harvest when the fruit has yellowed up by 25 to 50 percent. For distant markets harvesting should take place when the first hint of colour change has been observed at the basal end.

· Citrus

Maturity indices of citrus are based on juice content by volume, total soluble solids in the juices and the solids: acid ratio, according to variety and market. In general, fruits should contain at least 40 percent by volume of juice and the total soluble solids should be above 8%.

· Apples

For storage pick apples when fully mature but not fully ripe.

In the packhouse

· Grading of produce

Grading can only separate different quality products, it cannot improve quality.

· Remove damaged produce or else it will lower overall value and be a source of infection.

· Grade produce according to size and colour.

· Grading is best done by eye.

· Photographs, training and sizing aids help staff doing the grading to get their 'eye in'.

· Packaging of produce

Protects the produce from damage.

Is a convenient unit for distribution.

Can be an advertisement for the produce.

Labels or brands the product.

· Packhouses

The packhouse should be cool, offering shade and protection from rain, but allowing natural ventilation.

It should be designed to allow produce to flow in one direction.

Washing should be done in clean, running water.

Administer fungicide treatment by spraying and/or dipping.

Dry produce thoroughly before packing.

Grade and pack produce on tables, never on the ground.

Store in a cool, shady place. Despatch as soon as possible.

Packaging

· Locally available natural materials (e.g. baskets woven from bamboo, willow or cartons made from thin strips of wood or rushes).

Typical problems associated with these materials

Poor rigidity and design, which prevents multiple stacking.

Sharp edges, which can cause bruising or pierce produce.

Inefficient usage of transport space, which increases costs.

Damage to the environment due to overuse of local materials

(e.g. cutting down trees to make packing cases).

Advantages of using locally available materials

Material costs are low.

Both jobs and incomes are created for local businesses who make the packaging.

Local sources of packaging also make it easier to obtain and reduce the risk that packaging will not be available.

· Wooden boxes and trays are widely used throughout both the developing and developed world.

Advantages of using wooden materials

Strong, rigid and can also withstand refrigeration.

They can be recycled.

They can be manufactured locally.

Disadvantages

Wood is often not available or is very expensive.

Boxes are often not designed or manufactured properly, resulting in poor stacking and ventilation characteristics.

In an effort to save wood, the boxes are made too deep, resulting in damage to the bottom layers of produce.

Improved design is particularly likely to result in both savings in wood and reduced crop damage.

They can be reused but are difficult to clean.

The "European" produce tray has been successfully introduced in a number of countries.

Critical design features of this tray are:

Standard box sizes, particularly length and width, to facilitate stacking.

Using thin strips of wood for the floor and part of the sides but especially strong wood at the vertical corners, as these have to support the weight of the stack.

A gap between the sides of the tray and the floor of the next tray, allowing for ventilation.

No lid but paper placed on top of the produce to reduce the effects of dust, evaporation and to minimize pilfering.

Shallow trays are used for easily bruised crops such as tomatoes, peaches, grapes and mangoes.

Deeper boxes are used for apples and citrus. Larger but flimsier boxes are often used for cabbages and cauliflowers.

· Fibre board or corrugated cardboard are increasingly being used. There are a number of cleverly designed boxes that can be copied. Thes boxes are very light and can be easily printed on so to make them look very attractive.

Typical problems associated with these boxes

Boxes are expensive and cannot be recycled.

They need to be waxed to withstand long-term cold storage.

Manufacturing is done by large factories, often at the expense of rural jobs.

Raw materials often have to be imported.

Recent design improvements include boxes that are made from a combination of wood, for structural strength, and cardboard. Plastic has also been incorporated in designs, particularly to increase strength at the corners.

· Plastic containers are expensive and generally have to be imported. They have to be returned to the farm after use and are mainly used as field boxes or to supply a regular outlet such as a factory or supermarket.

· Bags and nets are cheap but provide no protection from damage. They can be used to package suitable produce like onions and potatoes into convenient units for handling and marketing.

· Plastic and paper are often used as lining or wrapping for produce.

· Printing, packaging presentation and brand names can all add value to produce but only in markets where consumers are wealthy and appreciate aesthetics and image.

Storage

Produce can be stored for both short-term and long-term purposes.

· Short-term storage is used to provide flexibility in marketing (e.g. when awaiting transport, or because buyers are not immediately available).

· Long-term storage is suitable for a few crops (see table next page). These can be held in stores well beyond the normal harvesting period. In turn, higher prices can normally be obtained and greater volumes of produce sold.

Refrigerated stores offer the longest storage conditions for produce, however they have some disadvantages.

They are expensive

They require high quality technical management.

They need electricity and, if supply is irregular, a generator.

Ventilated stores can be extremely cost-effective but require specific conditions

Cool night temperatures.

Buildings should be positioned to intercept the prevailing night-time winds.

Buildings should be protected from the sun's heat (e.g. by using shade from trees, painting the building white or building double-skinned walls).

When the ambient air temperature falls below that of the produce, normally at night, the air has to flow through the stored produce by opening louvres (this process can be automated and fans can be used to increase air flow rates).

Evaporative cooling from the incoming air (i.e. passing through moist air) which assists in cooling and humidifying the store.

Examples of ventilated storage

Potatoes can be held through the winter (three to nine months) provided they have been cured and treated with sprout suppressant.

After drying and curing onions can be stored using the same techniques but with lower humidities, (with onions there are great differences between varieties and production locations);

Garlic can be held for three to four months.

Sweet potatoes need to be cured at 28 to 30°C for a few days.

Subsequently they can be stored for up to six months.

Cabbages, carrots, pumpkins, apples, pears and lemons have all been successfully stored using ventilated stores (e.g. in Syria, apples can be stored in caves for nearly 10 months).

Annex 4 - Part 2
Generalized storage advice for fresh produce

Advice

Reason

Harvest produce at the proper maturity stage

Immature produce has thinner skin resulting in faster evaporation

Keep produce in shade

Water losses are four times quicker in sunlight

Store only crops that are clean

Diseased produce may infect sound crops. Damaged produce is easily infected and loses water. Dirt is a source of disease

Remove leaves attached to fruit and root crops

Leaves lose water rapidly

Apply approved sprout suppressant to potatoes, onions, garlic and ginger

Helps reduce sprouting during storage

Wash fruit in chlorinated water (200 ppm), or commercially-available fungicide for about 30 seconds, rinse and dry

Controls fungus disease

Line baskets with paper or leaves, and containers with polythene film with some ventilation holes

All act as barriers to high moisture loss

Store as soon as possible

The quicker produce is cooled, the slower the water evaporates and microbial activity is reduced

Storage rooms and containers should be clean

Reduces chance of infection from previous crop

Allow air circulation

Removes heat and ethylene given off by produce

Separate ripe from unripe fruit

Ripening gives off ethylene which hastens ripening of unripe fruit

Avoid mixing produce in the same storeroom

Odours and gases given off can damage other crops

Store leafy vegetables at a high relative humidity

Dry air rapidly draws moisture out of leaves

Cool moist conditions can be created by dripping water through burlap or jute sacks which serve as the wall covering of the cool store

The latent heat of evaporation cools the air.
The high humidities lessen water loss

Keep root crops in moist and slightly warm environment for 10 days before storage

This is called curing and hastens the healing of wounds

Bulb crops should be dried or cured until the neck is tight and the outer scales rustle

Diseases, particularly neck rot, are controlled, and moisture loss is reduced

Store roots and bulbs in drier atmosphere than other produce

Root crops sprout easily under moist conditions

Store tropical produce at 10° C or above, and temperate crops at below 10° C

Tropical crops suffer chilling injury at low temperatures

Use containers that can withstand stacking without injuring produce

Optimizes use of available storage space

Maintain high humidities in cold stores by preventing entry of warm air through using plastic strip curtains, keeping doors closed and wetting floors

High humidities for most crops reduce shrinkage and weight loss

Do not store onions in sacks piled to more than six high

To minimize compression damage

Keep potatoes stored in the dark

In sunlight they become green and poisonous

Clean, moist sawdust can be used to store fruit like tomatoes, rambutans and mangoes

High humidities are maintained.
Sawdust should be dried before re-use

Annex 4 - Part 3
Recommended transport practices

Advice

Reason

Take products out of the cold store during the cool part of the day

In warm conditions produce attracts condensation.
Water creates an environment for microbial attack

Transport produce during the coolest part of the day (dawn or night)

Heat causes faster respiration and water loss

Supervise loading and unloading.
Boxes should be lifted or carried, never thrown

To prevent boxes being dropped

Loading can be made easy by the use of loading bays or with steps or planks. Trolleys, conveyors and fork-lift trucks reduce handling

Produce can be carried on and off easily

For loading bulk-transported pineapples, cabbages and melons, the throw-catch system can be used but should involve at least five people

This is acceptable because of the need for speed in unloading and the low value of the individual fruit

Place padding (e.g. cardboard) between stacks of containers

To prevent the load shifting and to help absorb vibration

Provide space between crates for adequate ventilation

To prevent accumulation of heat and gases

Containers should be packed to reduce movement and to distribute weight evenly. Only stack to a height that the bottom containers can withstand without being crushed. Stow goods in reverse order to their unloading sequence

Shifting loads and poor weight distribution damage produce and cause vehicle-handling problems

Use white or white-painted canvas to cover the produce

The sun's heat will be reflected from produce

Provide ventilation during transport by raising the canvas cover 20 cm with a plank into a low tent shape

To provide airflow for the removal of heat and gases

Vans should be double-skinned and allow ventilation

To prevent the transmission of heat to the produce

Use horizontal dividers to separate layers of containers in the truck. This system can also be used for bulk transport of such produce as melons, cabbages, citrus and pineapples

Prevents compression damage to the produce being transported. Can be used for containers that do not stack, as well as bulk shipments

Bulk shipments should be cushioned with a thick layer of straw or leaves on the bottom and sides of the lorry

Water melons are transported this way in the USA to prevent damage

Jolting should be reduced by not driving too fast, particularly on poor roads. Long wheel-bases reduce damage, as does air-ride suspension, which is preferable to leaf-spring suspension

Jolting increases crop bruising and wastage, reducing sales income

Vehicles should be properly maintained

Breakdowns result in time wastage and may result in high levels of produce damage

During loading, unloading and when parked the truck should be in the shade

Gives protection from sun and rain

Annex 5
Training of agricultural officers

Marketing, as this guide has argued, is a powerful tool in accelerating rural development. In many countries "marketing" is still a relatively new concept. Traditionally, ministries of agriculture have focussed on supporting production activities. Most agricultural extension officers, both at senior and at junior level, have had little training in marketing as a tool for development.

Senior ministry officers need to understand and support marketing interventions

The most senior marketing specialist in the ministry should therefore brief senior officers on marketing. In these presentations time is normally limited. The presentation needs to be well prepared and focus on key issues, such as:

Ministries need to consider how they can train their staff in marketing

A marketing training course for extension officers should not be simply a forum for passing on information. To maintain interest, the courses need to be participatory.

Some of the techniques that have proven successful are:

A training course like this can transform the range of support services that a ministry of agriculture can supply to farmers.


Previous Page Top of Page Next Page