Browsing by Author "Singh, Mahender"
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ThesisItem Open Access Efect Of Plant Geometry And Nitrogen Levels On Growth, Yield And Quality Of Hybrid Sorghum (CSH-6)(College of Agriculture Chaudhary Charan Singh Haryana Agricultural University Hisar, 1982) Singh, Mahender; Singh, TejThesisItem Open Access Effect of nitrogen levels and weed control on yield and quality of spring planted sugarcane (Sllccharum officinarum L)(College of Agriculture Chaudhary Charan Singh Haryana Agricultural University Hisar, 1992) Singh, Mahender; Panwar, K.S.ThesisItem Open Access Effect of Planting Patterns and Weed Management on Productivity of Maiza (Zee Mays L.) Intercropped With Soybean [Glycine Max (L.) Merrill](Department of Agronomy R.C.A. : Udaipur, 2004) Singh, Mahender; Singh, PushpendraThesisItem Open Access Effect of planting patterns and weed management on productivity of maize (Zea mays L.) intercropped with soybean Glycine max (L.) Merrill(MPUAT, Udaipur, 2004) Singh, Mahender; Singh, PushpendraA field experiment entitled “Effect of planting patterns and weed management on productivity of maize (Zea mays L.) intercropped with soybean Glycine max (L.) Merrill” was conducted at Instructional Farm, Rajasthan College of Agriculture, Udaipur during kharif 2001 and 2002. The objectives were to work out appropriate planting pattern and weed control method for efficient weed management and higher productivity of maize + soybean intercropping system. The soil of the experimental field was clay loam in texture with medium fertility status (272.26, 281.43 kg N; 18.41, 19.57 kg P2O5 and 361.82, 369.25 kg K2O ha-1) and alkaline in reaction with pH 8.1 and 8.0, respectively during 2001 and 2002. The experiment consisted 24 treatments comprising of four planting patterns [sole maize, sole soybean, maize + soybean (1:1) and maize + soybean (2:2)] and six weed management methods (weedy check, hoeing at 25 DAS, alachlor 1.5 kg ha-1 PE, pendimethalin 1.0 kg ha-1 PE, alachlor + hoeing at 25 DAS and pendimethalin + hoeing at 25 DAS). These treatments were evaluated under factorial randomized block design with four replications. The results confirmed pivotal role of planting patterns and weed management methods in improving productivity of maize + soybean intercropping system. Planting patterns had significant impact on reduction of weed density, dry matter and nutrient uptake by weeds. Paired planting of maize + soybean (2:2) significantly reduced the weed density, dry matter and NPK uptake by weeds compared to alternate planting of maize + soybean (1:1) and sole maize system. In maize + soybean intercropping system, planting patterns did not exert any significant effect on growth parameters, yield attributes, yield and nutrient uptake by weeds, whereas, soybean crop significantly affected in this respect as compared to either sole crops. Results revealed that compared to alternate planting of maize + soybean (1:1), paired planting of maize + soybean (2:2) system is more efficient as this pattern brought about significant improvement in growth parameters of soybean like LAI and dry matter accumulation plant-1. Similarly, aforesaid planting pattern accumulated significantly higher nutrients compared to alternating planting of maize + soybean. By these improvements, paired planting of maize + soybean (2:2) recorded highest maize equivalent grain and stover * Ph.D. Scholar, Department of Agronomy, RCA, Udaipur ** Assoc. Prof., Department of Agronomy, RCA, Udaipur yield (55.55 and 102.51 q ha-1, respectively) which were higher by 49.49 and 24.10 per cent, respectively over sole maize. The corresponding increases were to the extent of 7.59 and 6.37 per cent, respectively as compared to alternate planting of maize and soybean (1:1). Likewise, aforesaid planting pattern recorded highest LER (1.600), net returns (34305 Rs ha-1) with B:C ratio (3.20) compared to rest of the patterns. Weed management practices markedly reduced crop weed competition. All the weed control treatments significantly reduced density, dry matter and nutrient uptake by weeds at all stages. At 50 DAS and at harvest, alachlor + hoeing at 25 DAS effectively reduced density and dry matter of monocot and total weeds while, dicot weeds were effectively controlled by pendimethalin + hoeing. Nutrient uptake by weeds was also significantly reduced by alachlor + hoeing followed by pendimethalin + hoeing. All the weed management methods significantly increased plant height, LAI, DMA, yield attributes and yield of maize over weedy check. Similarly, these weed management methods significantly improve growth parameters and yield attributes of soybean crop. Among different weed control treatments, alachlor + hoeing recorded significantly higher grain, straw and biological yields of maize and soybean by 59.75 & 60.96, 43.06 & 30.45 and 47.95 & 39.81 per cent, respectively over weedy check. The corresponding increases with pendimethalin + hoeing were to the order of 56.47 & 51.69, 41.31 & 27.97 and 45.75 & 35.24 per cent, respectively. Maize equivalent grain and stover yields were also recorded significantly higher by aforesaid treatments by 60.20 & 54.57 and 40.41 & 38.21 per cent, respectively over weedy check. The N, P and K content and uptake were also significantly increased by different weed control treatments. The combined effect of planting patterns and weed management indicated marked influence and significantly decreased density, dry matter and NPK uptake by weeds. Paired planting of maize + soybean (2:2) with the application of alachlor + hoeing at 25 DAS registered lowest density, dry matter and drain of nutrients by weeds. The economic evaluation show that alachlor and pendimethalin with one hoeing at 25 DAS were equally beneficial and both these recorded significantly higher net returns (Rs 29607 and 27836 ha-1) compared to weedy check (Rs 17554 ha-1). However, on the basis of B:C ratio, alachlor + hoeing recorded highest B:C ratio (2.79) closely followed by sole application of alachlor (2.76) and hoeing alone (2.75) and proved significantly better over pendimethalin + hoeing (2.48), pendimethalin alone (2.45) and weed check (2.05). Further, economics of treatment combination revealed that maximum B:C ratio (3.15) with net returns of Rs 39763 ha-1 recorded with application of alachlor + hoeing in paired planting of maize (30/90 cm) + soybean (2:2) intercropping system.ThesisItem Open Access Effect of Sowing Environments on Growth, Productivity and Agrometeorological Indices of Gobhi sarson (Brassica napus L.) Cultivars under Sub-tropics of Jammu(Sher-e-Kashmir University of Agricultural Sciences and Technology Jammu, J&K, 2020-11) Bhagat, Rakshit; Singh, MahenderAn experiment entitled, “Effect of Sowing Environments on Growth, Productivity and Agrometeorological Indices of Gobhi sarson (Brassica napus L.) Cultivars under Sub-tropics of Jammu” was conducted at the research farm of Agrometeorology Section, Division of Agronomy of Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Chatha during the Rabi, 2018-19. The experiment was laid out in Factorial Randomized Block Design with three sowing environments (20th October, 30th October and 9th November) along with three cultivars (GSL-1, ONK-1 and DGS-1) and replicated thrice. The soil of the experimental field was sandy clay loam in texture, slightly alkaline in reaction (7.60 pH), low in organic carbon (0.41 %) and available nitrogen (219.50 kg/ha) but medium in available potassium (132.46 kg/ha) and available phosphorous (14.00 kg/ha) with EC (0.15 ds/m). The experimental results revealed that the Gobhi sarson crop sown on 20th October recorded significantly highest growth parameters and yield attributes viz., plant height, leaf area index, dry matter accumulation, number of primary (5.17) & secondary branches/plant (12.91), siliquae/plant (160.18) and seeds/siliqua (19.22) in comparison to the crop sown on 30th October and 9th November. With the result (Source sink relationship), significantly highest seed yield was found under 20th October (1774 kg/ha) sown crop, while, significant reduction to an extent of 29.86 and 60.68 per cent were recorded with delayed sowing of 30th October (1366 kg/ha) and 9th November (1101 kg/ha). However, non-significant difference was observed with respect to number of plants/m2, test weight and harvest index. The cultivar GSL-1 recorded significantly higher plant height, LAI, dry matter, primary and secondary branches/plant, siliquae/plant, seeds/siliqua followed by ONK-1 and DGS-1 resulting in significantly higher yield of GSL-1 (1519 kg/ha) over DGS-1 (1269 kg/ha) but at par with ONK-1 (1457 kg/ha). The crop sown on 20th October took less number of days for the completion of vegetative phenophases (69 days) whereas more number of days for attaining physiological maturity (164 days) as compared to 30th October (158 days) and 9th November (153 days) sown crop. The agrometeorological indices viz., growing degree days, photo thermal units, helio thermal unit, pheno thermal index, heat use efficiency and radiation use efficiency were significantly highest under 20th October sowing and decreased with delay in sowing. The flower bud initiation and most seed green stage were found to be the most sensitive stage with respect to various weather parameters which positively and negatively influenced the yield and yield attributes. The B:C ratio was calculated higher in 20th October (2.06) sown crop as compared to 30th October (1.36) and 9th November (0.85) sown crop whereas GSL-1 cultivar recorded higher B:C ratio (1.60) followed by ONK-1 (1.49) and DGS-1 (1.19). But, ONK-1 performed better than GSL-1 and DGS-1 under delayed sowing done on 09th November.ThesisItem Open Access Genetic and immunochemical analysis of heterosis in green gram (vigna radiata (L.) Wilczek)(College of Agriculture Chaudhary Charan Singh Haryana Agricultural University Hisar, 1980) Singh, Mahender; Srivastava, O. PThesisItem Open Access Mycoflora of Cauliflower (Brassica Oleracea Var. Botrytis) Seed and its Effect on Seed Quality and Seed Yield(College of Agriculture Chaudhary Charan Singh Haryana Agricultural University Hisar, 1989) Singh, Mahender; Duhan, J. CThesisItem Open Access Performance of new basmati varieties as influenced by different tillage methods and sowing environments in direct seeded rice(Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, 2021-10) Tolma, Tayshi; Singh, MahenderThe present investigation entitled “Performance of new basmati varieties as influenced by different tillage methods and sowing environments in direct seeded rice” was carried out at Research Farm of Agro-meteorological Section, Division of Agronomy,Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Chatha, during the kharif 2020. The experiment was laid out in split-split plot design with three replications. The main plots consisted of two tillage methods (zero and conventional), sub plots oftwo sowing environments (10th and 25th June) and four new basmati rice varieties (Basmati-370, Basmati-118, Basmati-138 and Basmati-123) were taken under sub-sub plot. All the varieties under investigation were grown as per the recommended package andpractices ofSKUAST-Jammu forbasmati rice except for others treatments under investigation. The soil of the experimental site was sandy clay loam in texture, slightly alkaline in nature having pH of 7.14, EC (0.15 dS/m), organic carbon (0.38 %),low in available nitrogen (211.13 kg/ha), medium in phosphorus (14.15 kg/ha) and available potassium (134.64 kg/ha). The number of days taken by basmati rice varieties were numerically higher under conventional tillage than zero tillage. However, other growth parameters were not affected significantly by the tillage methods. But the yield and yield attributes (grain yield, straw yield, number of tillers/m2, number of effective tillers/m2 and number of grains/panicle) were significantly affected by the tillage methods. Whereas, the sowing environments affected the growth, yield, yield attributes and quality parameters of basmati rice crop. The 10th June sown crop recorded superior growth parameters, higher yield and yield attributes as well as quality parameters as compared to 25th June sown basmati rice crop. Whereas, among the new basmati rice varieties, Basmati-123 found significantly higher growth parameters, yield and yield attributes as well as higher B:C ratio. On the basis of one year experiment, it may be concluded that new basmati rice variety, Basmati-123 direct sown on 10thJune underconventional tillage method has better performance and recommended for sowing in irrigated sub tropical area of Jammu.ThesisItem Open Access Plasma and milk hormones as biomarkers of stress during extreme summer season in murrah buffaloes.(NDRI, Karnal, 2013) Chaudhari, Bijay Kumar; Singh, MahenderThesisItem Open Access Response of unflower (Helianthus annuus L.) genotypes to irrigation and nitrogen in sunflower-cotton cropping system(College of Agriculture Chaudhary Charan Singh Haryana Agricultural University Hisar, 1996) Singh, Mahender; Singh, harbirThesisItem Open Access Studies on host resistance and epidemiology of Alternaria blight of clusterbean(College of Agriculture Chaudhary Charan Singh Haryana Agricultural University Hisar, 1999) Singh, Mahender; Saharan, G. SThesisItem Open Access Studies on Immunogenicity of Equine Herpesvirus Type-1 Vaccine (penumabort-K)(College of Basic Sciences and Humanities Chaudhary Charan Singh Haryana Agricultural University Hisar, 1988) Singh, Mahender; Charan, ShivThesisItem Open Access Studies On Smut Of Pearl Millet (Pennisetum Glaucum(l) R. Br) And Its Effect On Seed Yield(College of Agriculture Chaudhary Charan Singh Haryana Agricultural University Hisar, 1993) Singh, Mahender; Duhan, R. CThesisItem Open Access Zinc and copper status of soils of national watershed myana district guna (M.P)(JNKVV, Jabalpur, 1992) Singh, Mahender; Tiwari, A.K