A.沙土B.壤土C.泥土D.粘土
A.氮肥要遲施、少施B.氮肥要早施、少施C.氮肥要早施、多施D.氮肥要遲施、多施
A.移密補(bǔ)稀、補(bǔ)種B.間苗、定苗C.補(bǔ)種、移密補(bǔ)稀D.定苗、間苗