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The objective of this paper was to estimate the agronomical efficiency of application of antierosive tillage to the black steppe soil as a basis for ecological growing of sunflower. In the conditions of the Ukrainian steppe, water is the major limiting factor of sunflower productivity. Experiments have shown that after antierosive tillage, the black steppe soil accumulates less water reserve than after conventional plowing. However, the difference, which amounted to 25-30 mm, did not decrease the yield of the sunflower hybrid Zaporozhskiy 9. Cultivation of Zaporozhskiy 9 at the row distance of 15 cm in the variant of antierosive tillage increased the yield of sunflower by 0.2-0.3 t/ha as compared with the cultivation at the row distance of 70 cm in the variant of conventional tillage.

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YIELD OF SUNFLOWER ON BLACK STEPPE SOIL OF UKRAINE / RENDIMIENTO DE GIRASOL CULTIVADO EN EL SUELO HUMÍFERO DE ESTEPA EN UCRAINA / RENDEMENT DU TOURNESOL DANS LE TCHERNOZIOM DES STEPPES D’UKRAINE