The important sign of physiological maturity of corn is ().


The important sign of physiological maturity of corn is ().

A.Bract leaves turn white

B.Stems and leaves turn yellow

C.Milk line disappears, and black layer appears

D.Grain hardens

正确答案:Milk line disappears, and black layer appears


Tag:CropCultivationScience 时间:2022-02-28 15:25:15