（续上期）第三讲选用良种合理密植一、选用良种大果粒品种产量较高,增产潜力明显,通常情况下,亩产均可超过２６０公斤,高产田可达７００公斤,弱点是生育期稍长;小果粒品种虽品质好、生育期短、含油率高,但产量较低,一般均在亩产２００公斤以下,高产田也很难突破２００公... (Continued) Lecture 3: Selection of Fine Strains for Reasonable and Close Planting 1. Selection of varieties of large fruit varieties yields higher yields and obvious potential for increase production. Under normal circumstances, the output per mu can exceed 260 kg and the yield of high yield fields can reach 700 kg. The weakness is the growth period Slightly longer; small fruit varieties, although good quality, short growth period, high oil content, but the yield is low, generally less than 200 kg per mu, high yield field is also difficult to break 200 ...