ABSTRACT
Usually fertilizers are inorganic in nature and most of them are the products of different industries. There are generally three types of chemical fertilizers available in the market namely nitrogenous, Phosphatic and Potassic fertilizers. The most important nitrogenous, Phosphatic and Potassic fertilizers used by the farmers are ammonium sulphate, urea as N sources, superphosphate and rock phosphate as P sources and muriate of potash as K sources. Sometimes micronutrient fertilizers like ZnSO4 as Zn, Borax as B-sources etc. are used by the farmers. The preparation of satisfactory mixed fertilizers requires detail knowledge of the chemical and physical characteristic of the individual material, their behavior in mixture under different condition of storage, transportation as well as under varying circumstances of atmospheric temperature and humidity. At present complex fertilizers obtained by chemical reaction are considerably more important than those obtained by mechanical mixing or fertilizer mixtures.
