Effects of Gap Size on Root Growth of Seedlings and Soil Physical and Chemical Properties in Pinus tabulaeformis Plantation in the Huanglong Forest The study on the physical and chemical characteristics of sand soil crust in the Minqin County, Gansu Province Effects of bio-organic fertilizer on soil microbial community and enzymes activities in walnut orchards of the Qinling-Bashan Region Soil physical and chemical characteristics under different vegetation restoration patterns in China south subtropical area. Research progress on effects of grazing on physical and chemical characteristics of grassland soil Ecological analysis on crop rotation systems of paddy field Analysis of the physical and chemical characteristics of Fujian tobacco-growing soils Comparisons of physical and chemical characteristics of peats for agricultural utilization produced by domestic and for.eign manufacturers Soil Properties of Different Alpine Shrub Grasslands in Eastern Qilian Mountains Effects of Nitrogen Rate and Transplanting Density on Physical and Chemical Characteristics and Lodging Resistance of culms in Hybrid Rice Effects of Clomequat-Uniconazole 30% Micro-Emulsion on Stem Physical and Chemical Characteristics of Rice