Manures are organic materials derived from animal excreta, such as cow dung, poultry droppings, and pig manure. They contain a variety of nutrients, including nitrogen, phosphorus, potassium, and organic matter. Manures also improve soil structure by adding organic matter, which helps to retain water and nutrients and improves drainage.
Fertilizers are synthetic materials that contain high concentrations of specific nutrients. They are typically used to supplement manures or to provide nutrients that are not present in sufficient amounts in the soil. Fertilizers can be classified into two types: inorganic and organic.
* Inorganic fertilizers are made from mineral sources, such as rock phosphate, potash, and ammonium nitrate. They are typically more concentrated than organic fertilizers and provide a quick release of nutrients.
* Organic fertilizers are made from plant or animal materials, such as compost, bone meal, and fish emulsion. They release nutrients more slowly than inorganic fertilizers, but they also improve soil structure and provide a source of organic matter.
The choice of manure or fertilizer to use depends on the soil type, crop requirements, and budget. In general, it is best to use a combination of manures and fertilizers to provide a balanced supply of nutrients and improve soil health.