采用土柱淋溶的方法研究了木质素对复合肥中钾的保持作用.The conserving effects of lignin on K + in compound we re studied through column - leach.据此将白浆土划归淋溶土纲, 冷性淋溶亚纲,漂白冷性淋溶土土类.Baijiang soil can he classified into alfisol class, cold alfisol subclass...
Gene mutations are alterations in the DNA code.基因突变是指DNA密码的改变.Any person abruptly starved shows alterations in intermediary metabolism of protein, carbohydrate, and fat.任何人突然遭到饥饿,就会出现蛋白质 、 碳水化合物和脂肪的中间代谢的改变.In 1992, these...