Acta Agrestia Sinica
Effect of Long-term Alfalfa Succession on Soil Sulfur,Calcium,and Magnesium in the Loess Plateau
WEI Feng, HAO Ming-de
. 2009, (3): 288 -293 .  DOI: 10.11733/j.issn.1007-0435.2009.03.005