New thinking on the reasonable utilization of non-competitive arable land in the hilly agricultural area Effect of slope and planting mode on erosion and nutrient loss in purple soils Protein Turnover of Wheat in Different Planting Modes at the Kernel-filling Stage Effects of planting densities and modes on activities of some enzymes and yield in summer maize Eco-engineering of integration of crop-livestock and its planting model Effects of planting density and mode on summer maize chloroplastD1 protein and photo-system II Planting Models Along Railroad AndTheir Ecological Significance Effects of planting densities and modes on developmental characteristics of summer maize populations in two varieties Effects of Planting Modes on Secondary Metabolite Contents in Eucommia ulmoides Barks Comparison on the flag leaf aging metabolism of different winter wheat genotypes under three planting models Influence of different planting modes of watermelon on the yield and meteorological factors in plastic shed EFFECTS OF DIFFERENT CULTIVATION SYSTEMS ON RICE GROWTH IN PADDY-FIELD