SOFT SPRING WHEAT YIELD ENVIRONMENTAL RESPONSE TO CHANGES IN NATURAL CONDITIONS IN SPACE AND TIME

The purpose of the study is to determine the dependence of the yield of soft spring wheat on climatic conditions in the time lag and in natural zones using the example of the Altai Region. Objectives: to determine the variation in the yield of spring soft wheat for 2016–2020, research on the subzones of the Altai Region; to calculate specific conditions and evaluate the effect of hydrothermal conditions on the yield of soft spring wheat. The object of the study was soft spring wheat and its productivity. It was found that the sustainability of agricultural land use in the Altai Region depends on environmental conditions and factors affecting the ecological response (yield) of wheat in the subzones of the region. Yields were studied for five years in five subzones. It was found that the variation (decrease) in the yield of spring wheat by subzones in the studied time lag occurs as you move from east to west of the region. This is evidenced by the interval and range of variation, arithmetic mean, standard deviation and other statistical values calculated by zones and years of study. Next, according to the HTC value, the years were ranked and the specific conditions of the spring wheat yield were determined. At the next stage of the work, the calculation of the general information content and the coefficient of efficiency of information transfer from the hydrothermal coefficient to the yield of spring soft wheat were carried out. It has been reliably established that in all subzones, the formation of the crop is largely influenced by the HTC in the first half of the growing season (May–June), and to a lesser extent in July–August. The results of the study can be used in forecasting the grain harvest and the formation of domestic consumption and exports.