A.砂質(zhì)土>壤質(zhì)土>黏質(zhì)土 B.壤質(zhì)土>砂質(zhì)土>黏質(zhì)土 C.黏質(zhì)土>壤質(zhì)土>沙質(zhì)土 D.壤質(zhì)土>黏質(zhì)>土砂質(zhì)土
A.鋅 B.錳 C.鉬 D.鐵
A.保肥性差 B.通氣透水性好 C.養(yǎng)分含量少 D.土溫變幅小