Effectiveness of applying fertilizers under watermelon on the meadow-grey soils in Mugan-Salyan zone

The meadow-gray soils are one of the most widespread species in Azerbaijan territory, mainly in the Kur-Araz lowland, in Nakhchivan plain regions, in the Samur-Davachi valley. The meadow-gray soils irrigated in the Mugan-Salyan zone are most commonly used in the agricultural lands of the region. Agrochemical characterization of soils plays an important role in defining a number of its features, including fertility, degree of provision of certain nutrients, determination of soil condition reaction, timing, norms, methods and proportions of fertilizers under separate plantings. In this context, the soil under watermelons has been researched, and the agrochemical properties of meadow-gray soils have been studied. Apart from the nutritional properties of plants, it has a great impact on the efficient use of fertilizers in the soil. Soil is the main source of plant nutrients. Different soils contain different amounts of nutrients. The soil contains more nutrients than it needs to produce high yields. Fertilized soil with less moisture increases the yield of agricultural crops. This is explained by the fact that only some of the nutrients in the soil are used by plants. Many of them remain unused. The nutrients contained in the soil go into the form used by plants from time to time as a result of the biological and chemical processes involved. In this regard, it is necessary to determine the amount of nitrogen, phosphorus, potassium and other elements found in the soil and which plants can easily use to ensure proper nutrition. The main reason why plants do not meet their nutrients is the use of fertilizers. Given the biology of watermelon, soil-climatic conditions and agrotechnical methods in Azerbaijan, the optimal dose and timing of fertilizers can be enhanced and improved.