摘要
Ten soils collected from different parts of China were used in a series of experiments to study fixation of NH￣+_4 and K￣+ by soils. When K￣+ was added concurrently with or prior to NH￣+_4, the soils were found to fix more moles of NH￣+_4 than those of K￣+, irrespective of the mole ratios of NH￣+_4 to K￣+ that were added.
ＰｒｅｆｅｒｅｎｔｉａｌＦｉｘａｔｉｏｎｏｆＡｍｍｏｎｉｕｍｔｏＰｏｔａｓｓｉｕｍｂｙＳｏｉｌｓ￥ＴＡＮＧＹＡＮ；ＦＥＮＧＫＥａｎｄＹＩＮＳＨＩＸＵＥ（ＤｅｐａｒｔｍｅｎｔＯｆＡｇｒｏｎｏｍｙ，ＡｇｒｉｃｕｌｔｕｒａｌＣｏｌｌｅｇｅ，Ｙａｎｇｚｈｏｕ...
