Analysis on factors affecting apple scab prevalence in Weibei semi-arid plateau of Shaanxi Province Primary Productivity Response of Astragalus adsurgens and Medicago Sativa to Interspecific Competition in Weibei Arid Highland on the Loess Plateau of China Monitoring and Evaluation of Apple Pesticide Residues in Shaanxi Effects of N,  P and K fertilization on spring maize yield and fertilizer use efficiency in Weibei rainfed highland Distribution of the fine roots of different aged apple trees in Weibei rainfed tableland of the Loess Plateau Effects of organic fertilization on soil nutrient availability and enzyme activity in arid areas Spatial distribution of soil microorganisms in apple orchards of different ages on the Weibei rainfed tableland of the Loess Plateau, China Effect of Grass Planting on the Microclimate of Apple Orchard in the Dryland Area of Loess Plateau Effects of different rotational tillage patterns on soil physical properties and yield of winter wheat-spring maize rotation field in Weibei highland Effects of rotational tillage on soil physiochemical propertiesand spring maize yield in Weibei Highlands Assessment of current conditions of household fertilizationof apples in Weibei Plateau Modeling the changes of yield and deep soil water in apple orchards in Weibei rainfed highland Exploration on the construction model of ecological agriculture in Weibei Loess Plateau Effects of tillage rotation and fertilization on soil aggregates and organic carbon content in corn field in Weibei Highland. Simulating Wheat Yield and Soil Moisture under Alternative No-tillage and Subsoil Tillage in Response to Fertilization Levels in Weibei Highlands Study of  tillage patterns suitable for soil physicochemical properties and crop yields in wheat/maize fields Effects of Growing Different Herbages on Soil Water-Holding of a Non-irrigated Apple Orchard in the Weibei Area of the Loess Plateau Distribution patterns of root systems of main planting tree species in Weibei Loess Plateau Monitoring and Evaluation of Apple Pesticide Residues in Shaanxi Study on Relations of Growth and Vertical Distribution of Fine Root System of Main Planting Tree Species to Soil Density in the Weibei Loess Plateau