Water permeability of dark chestnut soil and agrochemical factors determining chickpea yield

Abstract

A six-year analysis of changes in soil water permeability according to the basic tillage options is provided. Plowing with a PBS -10 P plow reduced water permeability by 3.1%. An increase in soil density by 6.3% for no-tillage and by 9.8% for minimum tillage reduced water permeability by 13.3 and 41.9%, respectively. Calculation of the multiple regression equation and full correlation analysis showed that the maximum influence on water permeability is exerted by the depth of the main cultivation - 44.92%, soil density determined this indicator by 38.17%, humidity by only 0.91%, the share of unaccounted factors was 16% . The yield of chickpea grain varied from 0.39 - 0.65 t/ha in 2020 (GTC_{May - August} = 0.20) to 1.54 - 2.12 t/ha in 2023 (GTC_{May - August} = 0. 64). Over six years of observation, according to factor A (basic tillage for chickpeas), the maximum yield of chickpea grain without the use of agrochemicals was noted on plowing: 1.19 t/ha (PLN-8-35) and 1.20 t/ha (PBS-10 P). Duringnon-moldboard processing (SSD-4 and PChM-4), the yield decreased by 10.9%, with a minimum (PM 7?3) by 22.7%. Foliar feeding with mineral fertilizers and fertilizers based on humic acids during the phases of  branching and the beginning of budding of chickpeas of the Zoovit variety increased the yield by 11.9–14.7%.