Browsing by Author "Lavlesh"
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ThesisItem Open Access Effect of manual and chemical methods of weed management on potato (Solanum tuberosum L.)(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2016-06) Lavlesh; Manoj RaghavThe present investigation was undertaken to evaluate the “Effect of manual and chemical methods of weed management on potato (Solanum tuberosum L.)” at Vegetable Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar (Uttarakhand) during rabi season of 2014-2015. The experiment was laid out in Randomized Block Design consisting of seven treatments replicated thrice. During the study, observations on per cent emergence, plant height, number of haulms per hill, fresh and dry weight of weeds, number of monocot, dicot and total number of weeds at 30, 45, 60 days after planting (DAP) and at de-haulming stage, fresh and dry weight of plants at de-haulming stage were recorded. In addition, grade wise number and weight of tubers per plot and per hectare, total number of tubers and total tuber yield per hectare, marketable yield per hectare, harvest index, dry matter content, protein content and specific gravity of tubers, nitrogen, phosphorus and potash uptake by haulm, tuber, plant and weeds were also recorded. Besides this, to assess the profitability of treatments, cost of cultivation, net profit and benefit: cost ratio were also worked out. The findings of present investigation revealed that performance of potato crop was significantly influenced by different weed control treatments. Among all treatments, herbicide metribuzin @ 0.75 kg a.i./ha pre emergence (T6) was found best with respect to overall plant growth, yield and quality parameters with a total yield (305.43 q/ha), net return (`147497.36) and benefit: cost ratio (1.93). Based on overall performance, it could be concluded that under prevalent climatic conditions of Uttarakhand tarai region, herbicide metribuzin @ 0.75 kg a.i./ha pre emergence is the best in terms of higher and economic yield of potato. Hence, recommended for commercial cultivation, provided all other scientific management practices are followed.ThesisItem Open Access Fertigation management in potato (Solanum tuberosum L.) under tarai conditions of Uttarakhand(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2019-09) Lavlesh; Manoj RaghavThe present investigation was undertaken to study the “Fertigation Management in Potato (Solanum tuberosum L.) under Tarai conditions of Uttarakhand” at Vegetable Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar (Uttarakhand) during rabi season of 2016-17 and 2017-18. The experiment was laid out in Three Factorial Randomized Block Design (FRBD) with one extra treatment consisting of two fertigation system viz., S1 (surface fertigation) and S2 (sub-surface fertigation), three fertigation scheduling viz., L1 (15% N:10% P2O5: 10% K2O of RDF between 15-30 days after planting (DAP), 40% N, P2O5 and K2O of RDF between 30-45 DAP, 40% N, P2O5 and K2O of RDF between 45-60 DAP, 15% N, 10% P2O5 and 10% K2O of RDF between 60-75 DAP), L2 (25% N, P2O5 and K2O of RDF between 15-30 DAP, 30-45 DAP, 46-60 DAT and 60-75 DAP) and L3 (20% N, P2O5 and K2O of RDF between 15-30 DAP, 30% N, P2O5 and K2O of RDF between 30-45 DAP, 30% N, P2O5 and K2O of RDF between 45-60 DAP and 20% N, P2O5 and K2O % of RDF between 60-75 DAP) and six fertigation treatment viz., T1 (120% of RDF), T2 (100% of RDF), T3 (80% of RDF), T4 (60% of RDF), T5 (40% of RDF), T6 (without fertilizer) along with one an additional treatment T7 (farmers practice) replicated thrice, During the study, various observations on growth parameters, various yield and yield attributing parameters along with quality parameters, nutrient uptake and water use efficiency was also recorded. Besides this, to assess the profitability of different treatment combinations, cost of cultivation, net return was also worked out. The findings of two year investigation revealed that performance of potato was significantly influenced by different fertigation system, fertigation scheduling and fertigation treatment. Among fertigation system, sub-surface system was found superior, among the three fertigation scheduling, schedule 3 was found better and among fertigation treatment, T1 : 120% of RDF was found best in terms of various growth, quality parameters, nutrient uptake in plant, water use efficiency and marketable yield (355.12 and 388.57 q ha-1), net return (`190623 and ` 222400). Based on the overall performance, it could be concluded that under tarai conditions of Uttarakhand, application of sub-surface fertigation @ 192: 120: 144 kg N, P2O5 and K2O per ha through schedule L3 (20: 30: 30: 20% N, P2O5 and K2O of RDF at 15-30: 30-45: 45-60: 60-75 DAP) gave maximum tuber yield and net return with water saving of 68.6% in potato. Hence, the same may be recommended for commercial cultivation.