Fertilizers are defined as substances used to improve the agricultural situation of agricultural crops and provide them with the necessary nutrients for their growth and to increase production in quantity and quantity. Fertilizers can be divided into the following types:
First Natural Fertilizer:
They are naturally formed and used in their natural form and include:
Animal fertilizers contain a high percentage of organic matter and some essential nutrients such as nitrogen, phosphorus, potassium and other elements. Animal fertilizers also contain organisms that analyze organic matter. Organic fertilizers also improve the soil's natural properties and reduce acidity.
Green fertilizers are green plants that grow and plow in the soil to improve soil properties. The most important of these plants are legume crops that are stabilized with atmospheric nitrogen. These fertilizers have the same features as previously mentioned.
Other organic fertilizers include waste from sewage, slaughterhouses, as well as farm residues from a previous crop. These fertilizers contain elements that differ depending on the source of the fertilizer.
Third Chemical fertilizers:
Which are man-made fertilizers by special techniques and contain nutrients in an inorganic form. The chemical fertilizers can be divided into simple fertilizers and compost. Simple manure contains one nutrient, the element for which fertilizer is added, such as calcium nitrate, ammonium nitrate, calcium chloride and other simple fertilizers. Generally, the simplest and most common fertilizers are nitrogen fertilizers Where it contains nitrogen as a fertilizer element and phosphate fertilizers which contain phosphorus as an essential element and potassium fertilizers containing potassium as a fertilizer. Composite fertilizers are those that contain more than one fertilizer, especially those that contain the three major components such as NPK and may contain some other necessary elements. Fertilizers can be divided according to the nature of compost to solid (dry) fertilizers such as those mentioned, and liquid fertilizers used in the form of solutions dissolved in water, which contain all the elements needed by the plant and its main importance is sprayed on plant leaves, and fertilizer, CO2 enrichment, which has recently been used in growth rooms, glasshouses and sometimes in the field where it is injected into the soil with irrigation water to increase plant photosynthesis and improve productivity.