Mineral fertilizers for onions: a review

For the production of onions, first of all, the proper organization of its nutrition is necessary. Both its productivity and product quality depend on this. First of all, onion nutrition requires mineral fertilizers containing macronutrients such as nitrogen, phosphorus and potassium. The quality of onions, their physiology and productivity depend on the application of nitrogen, phosphorus and potassium fertilizers, the need for which and the efficiency of use by plants vary depending on climatic factors, irrigation systems, varietal differences, soil and production conditions of cultivation in growing areas. This review examines in detail the effect of nitrogen, phosphorus and potassium, as the main components of mineral nutrition, on the growth, physiology and yield of onion. The review includes various databases such as Google Scholar, PubMed, Science Direct, SciFinder, Web of Science, RSCI, etc., online sources (Research Gate, Springer Nature Open Access, Wiley Online Library, etc.) are used.