Moisture dynamics of soil dry layer and water-restoring effects of alfalfa (Medicago sativa)-grain crop rotation on soil dry layer in alfalfa farmlands in Mountainous Region of Southern Ningxia Analysis of genetic diversity of salt tolerant alfalfa germplasms Adaptation of different alfalfa varieties in Qingdao, Shandong province A study on the pattern and effect of Zea mays intercropping with Medicago sativa