Water and Nutrient Use Efficiency in Diploid, Tetraploid and Hexaploid Wheats 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 Studies on Uptake and Utilization of Nitrogen,Phosphorus and Potassium and Yield Advantage in Capsicum/Maize Relay Intercropping System