The book is designed for the under graduate and post graduate students of Agriculture, Horticulture, Scientists, Researchers, Extension Personals of Farm Universities, Line Department of Agriculture, Horticulture and Farmers. The book focuses on the technical information on water management in different crops, principles and practices, nutrient management through fertigation and other related matters in order to increase the water use efficiency, nutrient use efficiency to mazimize the productivity of commercially cultivated Agricultural and Horticultural crops.