Economic efficiency 第1页

Cropping system optimization based on the comparative analysis of precipitation utilization in Sichuan Province Effects of Nitrogen and Potassium Fertilizers Application on Annual Yield and Economic Effect in Rotation of Rice and Wheat Impact of incorporation of rice straw into the soil on soil fertility and yield STUDY ON SOME PROBLEM IN THE GOODS SUPPLY OF IRRADIATION PROCESSING ECONOMIC EFFICIENCY ANALYSIS OF ELECTRON ACCELERATOR FOR IRRADIATION PROCESSING Spatial-temporal variations in eco-service values of pond aquaculture in Shanghai STUDIES ON THE ECO ECONOMIC EFFICIENCY OF HIGH BENEFICIAL INTERCROPPING MODELS IN UPLAND Effects of nitrogen application on nitrogen balance and use efficiency and yield of summer maize in soil with high residual nitrogen