Studies on Uptake and Utilization of Nitrogen,Phosphorus and Potassium and Yield Advantage in Capsicum/Maize Relay Intercropping System Effects of nitrogen input on yields advantage and interaction of the maize and potato intercropping Studies on Yield Advantage of Wheat and Peanut Relay Inter Cropping System and Its Relation with Nutrient Utilization Efficiency in Sandy Land Studies on Uptake and Utilization of Nitrogen,Phosphorus and Potassium and Yield Advantage in Capsicum/Maize Relay Intercropping System Wheat grain yield and nitrogen use characteristics under monoculture and intercropping with different nitrogen fertilization rates