Change In Chemical And Physical Parameters Of Light Chestnut Soil During Cultivation Of Winter Wheat On Precision Farming Site

Abstract

The aim of the research is to assess the effect of differentiated application of mineral fertilizers and treatment on the
change in agrochemical and agrophysical indicators of light chestnut soil during the growing season of winter wheat. The research
was carried out in the Almaty region on a rainfed eroded area of the site with an area of 2.5 ha during the cultivation of winter
wheat. By the period of harvesting in the phase of full ripeness of winter wheat in all fertilized plots, the supply of easily hydrolyzed
nitrogen was medium and increased (41-68 mg/kg). By the end of the vegetative season of winter wheat, its amount on fertilized
plots in the unwashed soil of the watershed of the slope of the southern and eastern exposure and in the medium-washed soil of
the middle part of the slope of the eastern exposure remained elevated and high - 39-60 mg/kg and 35-54 mg/kg. By the period of
winter wheat harvesting, its amount still decreased in the fertilized areas of the field, but insignificantly and remained in the
unwashed soil of the watershed of the slope of the southern and eastern exposure at the level of elevated and high supply - 365-
435 mg/kg and in the medium-washed soil of the middle part of the slope of the eastern exposure with a medium supply - 224-297
mg/kg. In the phase of milk ripeness of winter wheat, the highest content of productive moisture was observed in the middle part
of the eastern slope on chisel cultivation in medium-washed soil - 125.9-128.6 mm and the smallest in the watershed part of the
southern slope on subsurface cultivation in unwashed soil - 81.9 -83.9 mm. On the plots with fertilization at a dose of N60P60, the
best yields of winter wheat variety Talimi 80 were obtained in the middle part of the slope of the eastern exposure on mediumwashed soil with chisel cultivation at 30-35 cm - 31.3 dt/ha, subsurface cultivation at 10-12 cm – 31.1 dt/ha, moldboard plowing at
20-22 cm - 28.1 dt/ha