| |
| 41 |
China: azolla propagation and small-scale biogas technology, 1978 |
1978 |
Report |
|
|
| 40 |
China: recycling of organic wastes in agriculture, 1977 |
1977 |
Report |
|
|
| 39 |
Salt-affected soils and their management, 1988 |
1988 |
Report |
 |
|
| 38 |
Soil and plant testing and analysis, 1980 |
1980 |
Report |
|
|
| 38 |
Soil and plant testing as a basis of fertilizer recommendations, 1980 |
1980 |
Report |
|
|
| 37 |
Improved use of plant nutrients, 1978 |
1978 |
Report |
|
|
| 35 |
Organic materials and soil productivity, 1977 |
1977 |
Report |
|
|
| 34 |
Assessing soil degradation, 1977 |
1977 |
Report |
|
|
| 33 |
Soil conservation and management in developing countries, 1977 |
1977 |
Report |
|
|
| 32 |
A framework for land evaluation, 1976 |
1976 |
Report |
|
|
|
