Rice Bran - From data obtained from the Jepara Agricultural District office, it was estimated that 40 000 ha rice paddies are planted twice yearly. Some irrigated by reservoirs are planted three times yearly. There is an estimated supply of 10 000 kilotons from 58 mills. 28 of these use machinery and produce a clean bran. Thirty “hullers” or hand-home equipment mills, produce bran intermixed with hulls. Local price from 12 to 20 Rhs/kg.
Pelleted rice bran is exported from Buyaran by the P.T. Ondi Tapico Co., JL. Kutilang, Semarang, and P.T. Merbabu Pelleting Factory, Jl. Kali Baru Timur, Semarang.
Copra - Sun-dried and fired-dried coconut meat is constantly produced around Jepara and brought into the Jepara area from islands off-shore. This is trucked to Semarang where several firms press the copra to extract oil and then press the cake into pellets for export. Some copra is pressed locally and the cake sold to export firms in Buyaran or Semarang. The estimated supply is 10 000 tons yearly. Local price 30 to 40 Rhs/kg.
Cassava fresh and dried - Abundantly produced for local use and exported as broken pieces and as pellets by the two companies exporting rice bran plus Sie Sam Yang, Forma, JL. Tambak Sari No. 1, Semarang. Cassava cake (sun-dried residue from extraction of starch (tapioca) exported to Germany from the Tayu Cassava Factory.) Price of fresh cassava: 14 Rhs/kg. Dried cassava: 11 to 20 Rhs. Sago root and Canna (Ganjong) available seasonally at about the same price as cassava and performing the same function as a sticky binder for dry ingredients in fish feed formulas.
Kapok Seed - Exported from almost every large town in the area. Available during the year from storage but produced only during September to December. Some interest in pressing oil for sale in Java and exporting the cake. Price 30 to 40 Rhs/kg.
Peanuts and peanut cake - an estimated 6 000 tons is sold to exporters. One factory in Juwano pressed peanut for oil and sold some of the cake locally for food and exported the rest to Japan as a feed. Price 130 to 150 Rhs/kg for seeds or cake.
Soybeans and by products - Soybean oil meal (ground cake) was available from an oil mill in Juwano; price 130 to 150 Rhs/kg. Some soybean cake was exported but most of that produced in Java was used by feed mills as an ingredient in poultry and livestock feeds. Fried soybeans were eaten locally. Much of the local production in Jepara, Tayu, J wano, Kudus and other cities was made into a product called “Tahu.” This consisted of ground, soaked soybeans, cooked with excess water and pressed; the material retained in a fine cloth was pressed, cut into strips and sold for 5 Rhs per 60 gram piece. The press cloth residues were usually discarded or used as hog feed. From 30 Tahu factories in Jepara, about 1 000 kilogram wet press waste was available daily. When sold, it brought 20 Rhs per 20 kg.
Sugar cane byproduct - Three large government-owned sugar factories managed by Chinese were located in Kudus, Pati and Teyu. Estimated yearly production from the Kudus factory and prices are as follows:
| Crystallized sugar | 30 000 | kilotons | 100 Rhs/kg | |
| Bagasse | 100 000 | " | no value burned for fuel | |
| Molasses | 45 000 | " | 20.5 Rhs/kg | |
| Filter press cake | 75 000 | " | no value except as a filler in feeds, a soil conditioner and a source of calcium |
Fish - Appendix 2 shows the species of fish landed at Jepara and the prices. Dried fish in Jepara costs more than the fresh material, but in Jakarta, sun-dried fish is used as a fish meal ingredient in poultry feeds, and costs about 10 to 15 Rhs/kg. The fish used were small (slip mouths and herrings) surplus to the supply for the local markets.
Shrimp heads were available from several localities - costing from nothing to 10 Rhs/kg. Small shrimp heads were often used in local feeds using cassava as a holding base.
Legume leaves - Cassava, Turi (Sesbania grandiflora) and Petaicina (Leucaena glauca) contained sufficient protein to be valuable in fish feeds. These were widely distributed and could be collected for very little cost.
A battoir waste and other materials - No byproduct from the slaughter of cattle, goats or poultry was available except from the local market (Pasar Jepara). Blood was cooked and sold in cakes for 100 Rhs per 100 gram cake.
Green peas, sweet potatoes, wheat offal were available in season but at costs too high for fish feeds. Bone was available either fresh or burned and could be ground and added to feeds if the formula required more calcium and phosphorus.
