4Breeding of Early maturing and High-yield Wheat Yannong 22 and Discussion on Breeding Strategies14-16
9Effects of Reducing Density and Retaining Leafy Shoots on Insect-resistant Hybrid Cotton in Different Ecological Regions34-37
11Effects of Application Stages and Rates of Potassium on Quality of Maize with Different Starch Content42-45
16Improving Effects of Crop Rotation and Fallowing on Continuous Cucumber Cropping Soil in Solar Greenhouse59-63
18Number of P-dissolving Bacteria in Main Type Soils of Shandong Province and Its Correlation with Soil P-Supplying Properties67-70