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Optimum stripe arrangement for inter-cropping and mixed-cropping of different maize (Zea mays L.) genotypes Study on Planting Patterns About Wheat Inter-cropping and Multiple Croppingof Leguminous Crops in Gansu Hexi Oasis Irrigation Area Effects of Pear-Wheat Inter-cropping on Water and Land Utilization Efficiency EFFECTS OF APPLE-GINGER INTER-CROPPING IN THE HILLY LAND OF TAIHANG MOUNTAIN Effects of inter-cropping cotton with wheat on environmental factors and cotton growth and developmeat