Organic Farming :

Manures

Manures are plant and animal wastes that are used as sources of plant nutrients. They release nutrients after their decomposition. The art of collecting and using wastes from animal, human and vegetable sources for improving crop productivity is as old as agriculture. Manures are the organic materials derived from animal, human, and plant residues that contain plant nutrients in complex organic forms. Naturally occurring or synthetic chemicals containing plant nutrients are called fertilizers. Manures with low nutrient, content per unit quantity have a longer residual effect besides improving soil physical properties compared to fertilizer with high nutrient content.

Cattle shed wastes-dung, urine, and slurry from biogas plants
Human habitation wastes-night soil, human urine, town refuse, sewage, sludge, and sullage
Poultry Jitter, droppings of sheep and goat
Slaughterhouse wastes-bone meal, meat meal, blood meal, horn and hoof meal, Fish wastes
Byproducts of agro industries-oil cakes, bagasse and press mud, fruit and vegetable processing wastes, etc
Crop wastes-sugarcane trash, stubble, and other related material
Water hyacinth, weeds, and tank silt, and
Green manure crops and green leaf manuring material
Manures can also be grouped, into bulky organic manures and concentrated organic manures based on the concentration of the nutrients.

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