Among the various practices, judicious use of manures and fertilizers as one of the important strategies for increasing production of rice per unit area. The integrated use of organic manures with inorganic fertilizers can help to maintain optimum crop yield and required soil nutrient pool on sustained basis. The contribution of organic manure is to be judged not only in terms of nutrient contribution, but also by their role in building up of nutrient reserves in soil and increasing organic matter level of soil which ultimately improves physical, chemical and biological properties of soil and...