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Horticultural production is of major importance in our region, as it contributes significantly to the supply of fruit and vegetables consumption of the population of the country. On soils with lower fertility and lower organic matter content, repeated nitrogen supplementation is essential during vegetation. However, the application of nitrogen in many areas is regulated. Among the most important physical and chemical properties of the soil, we investigated the organic matter and nitrate contents and followed their correlation, especially in the case of vineyards and fruit plantations. In three consecutive years, we determined the distribution of nitrate content and analyzed the risk of high nitrate levels in the surrounding soils. We suggest, that organic fertilization is extremely important in sandy soils to balance nitrate and other nutrient levels in the soil.

Investigation of humus and nitrate content of soil with special reference to the nitrate sensitivity