A field experiment was carried out at AICRP on Weed Management Research Farm, Department of Agronomy, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola during kharif 2020-21. Fertigation is the technique of supplying dissolved fertilizers to crops through an irrigation system.The experiment was laid out in split plot design with three replications and twenty treatment combinations having four different fertigation levels and five weed management practices. The results revealed that, significantly maximum grain yield of rice (5103 kgha-1), straw yield (7268 kgha-1) and harvest index (41.25%) were found maximum at 125% RDNK level of fertigation in 5 splits than lower fertigation levels (75 and 100 per cent) and over conventional soil application of 100 per cent RDF. Nutrient use efficiency (NUE) was found better in lower drip fertigation level of75 per cent recommended dose of N and K per ha as compared to conventional soil application of fertilizers. Among the herbicides, directed spray of Pretilachlor + Pyrazosulfuron Ethyl @ 0.615 a.i. kgha-1 PE fb. Bispyribac sodium @ 0.025 a.i kgha-1 at 25 DAS resulted in maximum rice grain yield (5231 kgha-1) and also total nutrient uptake by crop and water use efficiency indicating the feasibility of using herbicides for effective weed management in rice and for enhancing NUE and WUE. The 125% RDNK through drip fertigation in 5 splits recorded maximum Gross Monetary returns (₹120353 ha-1), Net Monetary Returns (₹72924) and B:C ratio (2.54), nutrient use efficiency and water use efficiency.The herbicidal treatment of Pretilachlor + Pyrazosulfuron Ethyl0.615 kgha-1 PE fb. Bispyribac sodium 0.025 kgha-1 at 25 DAS registered maximum GMR (₹128755 ha-1), NMR (₹81412ha-1) and B:C ratio (2.72) among all herbicidal treatments, indicating the feasibility of using herbicides for effective weed management in rice.
during Kharif 2015 to study the effect of tillage and integrated nutrient management on potassium fractions in Vertisol under rainfed cotton. The experiment was laid out in randomized block design with sixteen treatment combinations with three replications. The treatments consisted of tillage (conservation and conventional),integratednutrient management comprised of eight treatments involving FYM, crop residues, in situ green manuring of sunhemp, glyricidia leaf manuring in combination with inorganic fertilizers and 100 per cent RDF (60:30:30 kg N, P 2 O 5 and K 2 O ha-1). The results revealed that, the various treatments significantly increased the various forms of potassium.Significantly highest water soluble, exchangeable, lattice and total Kcontent of soil and highest potassium use efficiency was recorded with application of 50% N through FYM + remaining RD through chemical fertilizers.Significantly highest percentage contribution to total potassium uptake by cotton was observed in the treatment with application of 100% RDF (60:30:30 NPK kg ha-1).
The present investigation was conducted during Kharif season (2018-19) to study the interactive effect of biochar, FYM and nitrogen on uptake of nutrients, quality and yield of Blackgram at Research Farm, Department of Agronomy, Dr. PDKV, Akola. The experiment was laid out in Randomized Block Design with nine treatments and three replications by split plot design (RCBD). The highest yield and yield attributing characters of blackgram were observed with soil application of biochar @ 10 t ha-1 + FYM @ 10 t ha-1 and nitrogen @ 20 kg ha-1. Nutrient content and uptake by blackgram was significantly highest in treatment where soil application of biochar @ 10 t ha-1 + FYM @ 10 t ha-1 and nitrogen @ 20 kg ha-1 was applied and it was on par with Biochar 5 t ha-1 + FYM 5 t ha-1 + Nitrogen 20 kg ha-1 and FYM 10 t ha-1 + Nitrogen 20 kg ha-1. The test weight was significantly highest in treatment receiving soil application of biochar @ 10 t ha-1 + FYM @ 10 t ha-1 and nitrogen @ 20 kg ha-1 and it was found to be on par with all other treatments expect treatment of control. Protein content of blackgram was increased (p<0.05) with the application of biochar @ 10 t ha-1 + FYM @ 10 t ha-1 and nitrogen @ 20 kg ha-1.
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