RESULTS REGARDING THE VALORIZATION OF WASTEWATER IN IRRIGATION OF GRAIN SORGHUM CULTIVATED ON SANDY SOILS.

Studies conducted on sorghum cultivation, located in the conditions of sandy soils in southern Oltenia, followed the influence of fertigation with filtered waste water, with a content of 221 mg total nitrogen/liter compared to classical fertilization and irrigation with normal water from surface water sources. The results of the biometric determinations highlight differences depending on the fertilizer wastewater doses applied, on the plant height, stem diameter and leaf area. The production results obtained showed yields between 4167-7667 kg/ha, noting the variant fertilized with N₈₀P₈₀K₈₀, applied at preparation of the germination bed + N₇₀, in vegetation, provided by fertigation with filtered waste water, applied fractionally in doses of 25% + 25% + 25 % + 25% (7667 kg/ha). The grain production obtained from sorghum grains in the different fertigation variants was positively correlated significantly with the weight of 1000 grains. [ABSTRACT FROM AUTHOR]