Foreign Wheat Germplasm Investigation, Introduction and Utilization in Ningxia Analysis and Appraisal of Heavy Metal Pollution of Main Vegetables Production Area in Shaanxi Province Postharvest quality and softening of “Fuji” apple from different production areas Variations of soil organic matter in typical orchard regions Temporal-spatial variation of elongating time of wheat in Huang-Huai wheat production area Identification of agricultural resource & environment determination of the principle grain production area in China Feasibility study for whole plant medicinal use of Tribulus terrestris Studies on vicissitudes of Amomum L. and its production area Changes in Fatty Acid Content of Walnut in Different Production Areas of Sichuan Province