3)在粘粒含量为1.5%~2%时,混合15%~20%的沸石或混合5%~15%的泥炭,也能够达到较好的调节效果。

• When clay content was 1.5%25~2%25,add 15%25~20%25 zeoplite or 5%25~15%25 peat to achieve proper permeability.