The influence of seed application rates and doses of mineral fertilizers in the zones of soil fertility of the studied area on the water regime of the soil and the yield of spring wheat in the conditions of the Altai krai is considered during field experimental studies. To select the optimal experimental parameters that ensure reliable data acquisition, a full-factor experiment was implemented for three factors. Moisture reserves in the meter layer for each experimental site were determined during the growing season. Based on the superimposition of graphical dependencies of the amount of seeds, fertilizers and the yield obtained by soil fertility zones, the significance of the studied factors was revealed and their rational combinations were established to ensure maximum yield. It has been confirmed that the soil fertility zone has the most significant impact on the water regime of the soil and the yield of spring wheat among the studied factors. The high efficiency of the correct application of differentiated sowing and the application of mineral fertilizers has been proven. For example, the range of yield changes was 28.6–41.5 c/ha.

Belyaev Vladimir I., Buksman Viktor E., Sadov Viktor V., Smyshlyaev Andrei A., Tur Andrei V.

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