7Richards J H,Caldwcll M M. Hydraulic lift:Substantialnocturnal water transport between soil layers by Artemisia tridentate roots [J]. Oeeologia, 1987,73 (6): 486 -489.
8Rengasamy P, Olsson K A. Sodicity and soil structure[J]. Aust. J. Soil Res, 1991, 29:935--952.
9So H B, Aylmore I. A G. How do sodic soils behave? The effects ofsodicity on soil physical behavior[J]. Aust. J. Soil Res, 1993,31 : 761-777.