Vol. 11, Issue 12 (2022)

Author(s):
PK Pidurkar, Dr. GR Hanwate, NP Asati and BB Jaybhaye

Abstract:
The field experiment was carried out to study “Effect of humic acid on soil nutrient dynamics, yield and quality Soybean (Glycine max L.)”, cultivar MAUS-158 during kharif season of the year 2021 at departmental farm of Soil Science and Agricultural Chemistry, College of Agriculture, Latur. The experiment was laid in randomized block design with three replications and eight treatments viz.,T₁ (control), T₂ (RDF), T₃ (RDF + soil application of humic acid @ 5 kg ha^-1), T₄ (RDF+ soil application of humic acid @ 10 kg ha^-1), T₅ (RDF+ soil application of humic acid @ 15 kg ha^-1), T₆ (T₃ + foliar application of humic acid @ 0.2% at 30 & 45 DAS), T₇ (T₄ + foliar application of humic acid @ 0.2% at 30 & 45 DAS), T₈ (T₅ + foliar application of humic acid @ 0.2% at 30 & 45 DAS). The field study indicated that growth and available nutrients of soybean crop were significantly influenced due to humic acid and RDF. The growth parameter viz., plant height, number of branches plant^-1, nodulation, root length was significantly affected due to T₈ (RDF + soil application of humic acid @ 15 kg ha^-1+ foliar application of humic acid @ 0.2% at 30 and 45 DAS). Available N, P, K and S were recorded at flowering, pod formation and harvest. Significant and maximum contents of available N, P, K and S were noticed with application of treatment T₈ (RDF + soil application of humic acid @ 15 kg ha^-1+ foliar application of humic acid @ 0.2% at 30 and 45 DAS), whereas the T₁ (control) showed least values.Thus, it can be concluded that soil and foliar application of humic acid increase growth and available nutrients parameters. The significantly superior result recorded by treatment T₈ (RDF + soil application of humic acid @ 15 kg ha^-1+ foliar application of humic acid @ 0.2% at 30 and 45 DAS) next to this treatment T₇ (RDF + soil application of humic acid @ 10 kg ha^-1 + foliar application of humic acid @ 0.2% at 30 and 45 DAS) was best option.