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选出一株良种,要在几年内能有100亩以上的繁殖速度,才能尽快形成商品价格,实行良种良价;不能形成商品价格的良种,要求推广是十分困难的。
To select a good seed, it is necessary to have a breeding speed of more than 100 mu in a few years so that the commodity price can be formed as soon as possible and the good price of the good seed can be implemented. It is very difficult to form a good seed for the commodity price and to demand popularization.