Effect of Sampling Strategy on Identification of Cultivars of Astragalus sinicus L. by SSR Marker Effect of fertilizer amount on yield and nutrient accumulation of green manures Effect of N, P and K fertilizer combination and application rate on yield of Astragalus sinicus L. Development of Microsatellite Markers for Astragalus sinicus L. and Its Application for Variety Identification Effect of turning over Chinese milk vetch (Astragalus sinicus L.) on soil nutrients and microbial properties in paddy fields