单项选择题
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%
A.规定天数内发芽种子／供试种子X100 B.发芽试验初期规定天数内发芽种子粒数／供试种子粒数×100 C.发芽种子／供试种子X100 D.发芽种子粒数／供试种子粒数x100