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Effect of long-term conservation tillage on soil water regimes and leaf water potential of crops in rainfed areas of the Loess Plateau Effects of long-term conservation tillage on soil physical quality of rainfed areas of the Loess Plateau Effect of conservation tillage on weeds in a rotation system on the Loess Plateau of eastern Gansu, Northwest China. Effect of long-term conservation tillage on soil fertility in rain-fed areas of the Loess Plateau Temporal and spatial disparities of soil enzyme activities during the spring wheat growing season under different tillage systems Effects of conservation tillage on crop yield and carbon pool management index on top soil withina maize-wheat-soy rotation system in the Loess Plateau Effects of conservation tillage on soil water regimes in rainfed areas Effect of Conservation Tillage on drymatter accumulating and Yield of Winter Wheat in Oasis Area