Mineral fertilizers are salts that contain elements necessary for plants and increase productivity when applied to the soil. Plants contain up to 60 chemical elements. Their normal development requires oxygen, carbon, hydrogen, nitrogen, phosphorus, potassium, magnesium, sulfur, calcium, iron, etc. depends on the elements. The reserve of these elements is concentrated in air and soil. From the air, plants take the carbon dioxide necessary for photosynthesis, and from the soil, water and minerals. As a mineral component, nitrogen, phosphorus and potassium are considered life elements for plants.
Mineral fertilizers depend on their agrochemical importance, composition (according to nutrients), physico-chemical properties (mainly water solubility in the soil), physiological activity in the soil, method of obtaining, etc. are classified according to According to their agrochemical importance, mineral fertilizers are divided into two parts: direct and indirect. Direct fertilizers are such mineral fertilizers that the plant directly absorbs the necessary element in the form of a compound. Indirect fertilizers serve to mobilize nutrients already present in the soil. For example, ground lime or dolomite lowers soil acidity. The use of gypsum improves soil salinity properties, etc. Direct mineral fertilizers are phosphorus, nitrogen, potassium, magnesium, etc. divided into groups. According to the amount of nutrients, mineral fertilizers are divided into two parts: simple (the composition includes one nutrient) and complex (the composition includes two or more nutrients).
