Spatial and temporal characteristics of soil water dynamics and crop yield response from a 4-year of lucerne and winter wheat rotation system in the Loess Plateau Adaptability of APSIM Model in Simulating Lucerne-Wheat-Millet Crop Rotation System in Haiyuan Region of Ningxia Changes and mechanism in response of photosynthetic rates of lucerne residueto cutting under different water treatments Effects of lucerne-crop rotation patterns on soil aggregate stabilityand soil organic carbon Root-invading fungi of lucerne and winter wheat in the rotation system on the Loess Plateau Isolation and identification of lucerne seed-borne growth promoting Paenibacillus polymyxa in Gansu Province, China Adaptability of APSIM Lucerne Model in Semiarid Area of Ningxia Soil carbon fraction differences under different grass-crop rotations on the Loess Plateau, Central Gansu Effect of lucerne-crop rotations on soil physical properties in the semiarid Loess Plateau of Central Gansu Effect of cutting on root growth in lucerne Effects of Lucerne Removal Time on Soil Water and Productivity in a Lucerne- Wheat Rotation on the Western Loess Plateau