this kind of fish is processed into fishmeal trash fish - the main raw material in the production of animal feed. fish meal is made from meat, fish, trash fish, whole fish, fish heads and bones and other by-products from fish processing. currently in vietnam fish meal is produced from two sources of...
implementation models , / , ppd station conducting field seminars evaluate the effectiveness of the model shows that the ha , the investment costs of seed, fertilizer materials , public , pesticide is million at a yield of tons , with the price of / kg, except for all the interest expense also . through...