单项选择题
A.撒播 B.条播 C.点播 D.精量播种
A.播种量(g/宙)=每亩穴数/每克种子粒数x种子纯度x种子发芽率 B.播种量(g/亩)=每亩穴数x每穴种子粒数/每克种子粒数 C.播种量(g/亩)=每亩穴数x每穴种子粒数/种子纯度X种子发芽率 D.播种量(g/亩)=每亩穴数x每穴种子粒数/每克种子粒数×种子纯度X种子发芽率
A.100% B.80% C.85% D.90-98%