Fertilizers are generally of two types: Organic and Inorganic. Organic Fertilizers Organic fertilizers are also known as natural fertilizers or manures. They are derived from animal waste and plant materials. O rganic fertilizers can be derived from several sources on the farm. 1. Animal manure Animal manure, also known as pen manure, is derived from partially decomposed solid materials produced in livestock pens. These manures are composed of animal droppings or dung, litter, bedding, and slurry from washing the pens of farm animals such as dairy cattle, goats, and sheep. 2. Composting Composted manure is a type of organic fertilizer made from plant materials like leaf litter, grass clippings, and crop residues. In the composting process, these plant materials are allowed to decompose with the help of microorganisms. 3. Green manure Green manure is a type of manure that is derived from using a green crop which is usually a legume crop. The crop is ploughed and...