Browsing by Author "U.N. Shukla"

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Effect of crop geometries and fertility levels on growth, yield and residual nutrients of cotton (Gossypium hirsutum) hybrids under rainfed condition
(Indian Council of Agricultural Research, 2014) U.N. Shukla; M.S. Khakare; Smita Singh; S.K. Verma
A field experiment was conducted during kharif season of 2008-09 to study the effect of crop geometries and fertility levels on growth, yield and residual nutrients of cotton (Gossypium hirsutum L.) hybrids under rainfed condition. Cotton hybrids MLCH 318 was planted under wider crop geometry of 90 cm × 60 cm which recorded significantly higher growth parameters, monopodial branches and seed cotton weight/plant. However, yield potential of MLCH 318 were higher under closer crop geometry (60 cm × 60 cm) and recorded significantly taller plant, yield attributes and yield of cotton over wider crop geometry of 90 cm × 60 cm (S1) due to more number of plants stand at initial and harvest stages, respectively. Although, cultivar VBCH 2231 (V2) with crop geometry of 90 cm × 60 cm (S1) recorded more in residual status of N (200.44 and 204 kg/ha), P (16.82 and 16.67 kg/ha) and K (496.50 and 489.04 kg/ha), respectively. Among fertility levels, growth characters, yield attributes and yield of cotton with residual N (204.11), P (17.24) and K (495.26 kg/ha) were significantly higher under highest levels of fertility, i.e. 62.5: 31.25: 31.25 kg N: P: K/ha. Thus, it concluded that sowing of cultivar MLCH 318 at crop geometry of 60 cm × 60 cm and fertilized with. 62.5: 31.25: 31.25 kg N: P: K/ha produced significantly higher yield attributes and yield under rainfed condition.
Effect of seedlings age, cultivars and weed management on weed dynamics, nutrient removal and yield of rice (Oryza sativa) under system of rice intensification (SRI)
(Indian Council of Agricultural Research, 2015) U.N. Shukla; V.K. Srivastava; Smita Singh; U.S. Ram; A.K. Pandey
A field experiment was conducted to study the effect of age of seedlings, cultivars and weed management on weed dynamics, NPK removal and yield of rice (Oryza sativa L.) under SRI at Banaras Hindu University, Varanasi during 2010 and 2011 in split-plot design replicated thrice. The tender aged seedling (10 days) and hybrid rice cultivar PHB 71 had significantly marked potential to minimize the weed dynamics of grassy weeds (Echinochloa spp. and Cynodon dactylon), sedges (Fimbristylis miliacea and Cyperus spp.) and BLWs (Ammania baccifera and Ludwigia parviflora) significantly that resulted in marked reduction on total weed density, weed dry weight, weed index resulted in higher weed control efficiency over older seedling (15 days) of NDR 359. Four times cono-weeding at 10, 20, 30 and 40 DAT minimised grassy weeds over rest of the weeding treatments, but at par with pre and post-emergence application of pretilachlor + bispyribac-Na herbicides in respect of sedges and BLWs with total weed density that resulted in improving weed index due to higher weed control efficiency over 15 days old seedlings and other weed management treatment during both the years of study. Similarly, transplanting of younger seedlings (10 days) of PHB 71 produced significantly higher rice yield under 4 times cono-weeding closely followed by pre and post-emergence application of pretilachlor + bispyribac-Na. Significantly lower NPK removal by weeds at 45 DAT recorded with 10 days old seedling of PHB-71 under 4 times cono-weeding at 10, 20, 30 and 40 DAT (W4), though remained at par with pre and post-emergence application of pretilachlor + bispyribac-Na.
Efficacy of herbicides and nutrient management on weed dynamics and yield of French bean (Phaseolus vulgaris)
(Indian Council of Agricultural Research, 2018) Smita Singh; R.P. Singh; U.N. Shukla; J.K. Singh; O.N. Singh
A field experiment was conducted to assess the effect of herbicides and integrated nutrient managements on weed dynamics, NPK removal and yield of French bean (Phaseolus vulgaris L.) at Banaras Hindu University, Varanasi during 2009 and 2010. The results revealed that the pendimethalin fb quizalofop-p-ethyl had significantly marked potential to minimize the weed dynamics of Chenopodium album, Melilotus alba, Melilotus indica and Cyperus rotundus significantly, resulted in marked reduction on total weed density (41.48 and 41.11 nos/m), weed dry weight (45.62 and 44.68 g/m) and weed index at all stages of crop growth during 2009 and 2010, respectively and showed higher weed control efficiency over the alone application of pendimethalin. Recommended dose + 200 kg Wellgro Soil (Dust) minimized broad leaves weeds (BLWs) over rest of the fertility levels but at par with RD + 300 kg Wellgro Soil (Dust) in respect of BLWs weed density that resulted in enhanced weed index due to higher weed control efficiency over rest of the fertility levels during both the years of study. Significantly lower NPK removal by weeds at harvest recorded with pendimethalin fb quizalofop-p-ethyl under recommended dose + 200 kg Wellgro Soil (Dust), though remained at par with recommended dose + 300 kg Wellgro Soil (Dust). © 2018 Indian Council of Agricultural Research. All rights reserved.
Evaluation of growth, yield and quality of maize as influenced by genotypes and nitrogen levels
(Bangladesh Botanical Society, 2014) Pradeep Singh; U.N. Shukla; Kaushal Kumar; Smita Singh; V. Kumar; Rajeev Kumar
Among genotypes, Dekalb 900 M Gold recorded significantly higher dry matter/plant, LAI, cobs placement height, grain yield, nitrogen content, protein content, protein yield and protein productivity than other genotypes. Leaves/plant and phytosynthetically active radiation (PAR) above canopy did not influenced by genotypes. Dry matter/plant, plant height, LAI, cobs placement height, protein content, protein yield and protein productivity exhibited higher under highest levels of nitrogen (160 kg N/ha), but at par with 120 kg N/ha. However, grain yield (6300 kg/ha) was highest under nitrogen levels of 120 kg/ha, but also at par with 160 kg N/ha (6240 kg/ha). The effect of applied nitrogen was found non-significant in respect of leaves/plant, PAR above and below canopy, photosynthetically active radiation interception and days taken to tasseling and silking.
Growth, yield and economic potential of rice (oryza sativa) as influenced by different age of seedlings, cultivars and weed management under system of rice intensification
(Indian Council of Agricultural Research, 2014) U.N. Shukla; V.K. Srivastava; S. Singh; A. Sen; V. Kumar
A field experiment was conducted to study the growth, yield and economic potential of rice as influenced by different age of seedlings, cultivars and weed management under system of rice intensification on sandy-clay-loam soil at Agricultural Research Farm of Institute of Agricultural Sciences, Banaras Hindu University during the two consecutive kharif (rainy) seasons of 2010 and 2011. The experiment was laid out in split-plot design with two ages of seedlings with two cultivars assigned to main plots and seven weed management treatments were allocated as subplot treatments has replicated thrice. Transplanting of younger age seedling (10 days) of PHB 71 recorded significantly higher growth attributes, viz. plant height, no. of green leaves/hill and dry matter accumulation with yield attributing characters. Similarly, ten days old seedlings of PHB 71 also produced significantly higher yield (grain and straw) that fetched maximum benefit in respect to gross return, net return and B: C ratio over old aged seedling (15 days) of NDR 359 during 2010 and 2011. Among weed management, cono-weeding 4 times at 10, 20, 30 and 40 days after transplanting (DAT) recorded significantly higher growth attributes, yield attributes and yield, but sequential application of pre and post-emergence herbicides, i e pretilachlor + bispyribac-Na was found economically feasible under SRI due to lesser labour requirement.
Performance of physiological basis of rice hybrids under system of rice cultivation
(Bangladesh Botanical Society, 2014) Pushpraj Singh; I.M. Khan; Smita Singh; R.K. Tiwari; U.N. Shukla; Phiji Philip
Among the rice hybrids, PRH-10 recorded significantly highest chlorophyll content, dry matter, LAI, CGR, RGR, NAR, root length, root: shoot ratio and grain yield (9.95 t/ha) over the rest of hybrids followed by NPH-567. The lowest values of these parameters were noted in IR-36. The higher straw yield was recorded (144.8 t/ha) in NPH-567.