A.有機(jī)質(zhì)小于10%的土 B.有機(jī)質(zhì)小于5%的土 C.有機(jī)質(zhì)超過10%的土 D.有機(jī)質(zhì)小于8%的土
A.0.1g B.0.01g C.0.001g D.1.0g
A.10~15% B.5~10% C.5~8% D.10~20%