Vignesh Chakkaravarthi S

Chemical fertilizers - Chemical fertilizers are manufactured inorganic substances containing one or more essential plant nutrients in a readily available form. They are used to supply nutrients required for crop growth and development. organic fertilizer - Organic fertilizers are fertilizers obtained from plant, animal, or other natural organic materials. They supply nutrients and also improve the physical, chemical, and biological properties of soil. Types of chemical fertilizers Nitrogenous fertilizers Supply nitrogen (N). Examples: Urea – 46% N Ammonium sulphate – 21% N Calcium ammonium nitrate – 26% N Phosphatic fertilizers Supply phosphorus (P). Examples: Single Super Phosphate (SSP) – 16% P₂O₅ Diammonium phosphate (DAP) – 18% N, 46% P₂O₅ Potassic fertilizers Supply potassium (K). Examples: Muriate of Potash (MOP) – 60% K₂O Sulphate of Potash (SOP) – 50% K₂O Complex fertilizers Contain two or more major nutrients. Examples: NPK 10:26:26 NPK 17:17:17 Micronutrient fertilizers Supply micronutrients such as Zn, Fe, B, Mn and Cu. Examples: Zinc sulphate Borax Ferrous sulphate