Root growth, yield components, and quality of  Redgram  (Cajanus cajan ) as  influenced by foliar spray of humic acid

The present study examined the effect of foliar spray of humic acid on root growth, yield components, and quality in Redgram (Cajanus cajan ). The study was conducted during Kharif 2019-20 at Main Agricultural Research Station, UAS, Raichur by using a randomized block design. The effectiveness of humic acid was studied with different levels as T1 – Humic acid liquid 15% @ 1.0 ml/l of water, T2 – Humic acid liquid 15% @ 1.5 ml/l of water, T3 – Humic acid liquid 15% @ 2.5 ml/l of water, T4 – Humic acid liquid 15% @ 4.0 ml/l of water, T5 – Planofix 4.5 % @ 20ppm and T6 – as a control. The redgram productivity is limited by flower and pod drop during the crop growth. Management of same through foliar application of humic acid 15% is planned. Result of the research study revealthat redgram root growth including root length, shoot length, root dry weight , shoot dry weight , leaf area, dry matter production, flower drops, minerals content (quality), and yield components was measured at 60,90 DAS and at harvest, respectively. Significant differences (p<0.5) were observed for all the above-mentioned parameters across the humic acid levels. Based on this study, the foliar application T4-Humic acid liquid 15% @ 4.0 ml/l of water may be recommended to improve growth physiology, quality, and yield components of the program in similar environmental conditions. Further, research is required in diverse plant environments to determine economically feasible application levels of Humic acid while comparing it with other plant growth regulators sources.