Organic manure :- Organic manure are the natural plant and animal products that are capable of providing nutrients to the plants. They are bulky in nature and have no definite composition. Manures are effective source of nutrients for most of the crops. The manures can also be used along with chemical fertilizers to enhance the productivity of soil. The manures when applied to the soils add to the organic fraction of soil. Organic manure contains plant nutrients and they have direct effect on the plant and crop growth. It increases the soil organic matter content and also improves the physical properties of soil. It increases the humus content of soil and as a result water holding capacity of soil gets increased. Bulky organic manure supply food for soil micro-organisms. This increases the activity of soil microbes which in turn converts unavailable form of plant nutrients to readily available form. Role of organic manure:- Organic manure binds the soil parti...