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Subject: Agronomy × Author: Jitendra Kumar × End date: 2009 ×
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    ThesisItemOpen Access
    Effect of vermicompost and biofertilizers on performance of lemon tulsi (Ocimum basilicum L.) under tarai condition of Uttarakhand
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2007-07) Jitendra Kumar; Pal, M.S.
    Field experiment was conducted at Medicinal Plant Research and Development Centre, (Haldi), G.B.Pant University of Agriculture & Technology, Pantnagar during Kharif season of 2005 􀂲 06 on sandy loam soil with neutral pH, 0.8% organic carbon and 186.59, 22.85 and206.36 kg/ha available N, P and K, respectively to study the 􀂴Effect of vermicompost and biofertilizers on Performance of Lemon Tulsi (Ocimum basilicum L) under Tarai condition of Uttarakhand􀂵. The experiment was conducted in the Randomized Block Design (RBD) with three replications. The total treatments were 10 consisting of two levels of vermicompost (VC) i.e. 5 and 10 t ha-1 along with biofertilizers i.e. Azotobacter (AZT), Azospirilium (ASP) and Phosphate solubilizing bacteria (PSB). Significantly higher fresh herbage yield was recorded with the application of Vermicompost 10 t ha-1 + Azotobacter. Treatments consisting of vermicompost @ 5 t ha-1 gave 7.6 and 17.9 % higher herbage yield than control treatment. The combined application of Vermicompost @ 5 t ha-1or 10 t ha along with biofertilizers produced on an average 5.5 and 4.1 % higher herbage yield, respectively than alone application of vermicompost separately. The higher values were attributed to higher growth parameters including plant height, fresh and dry weight accumulation per plant and leaf: stem ratio. Significantly higher oil content in plant parts as well as total oil yield were recorded when 10 t ha-1 Vermicompost was applied along with root treatment with PSB. Application of Vermicompost @10 t ha-1 + Azotobacter facilitate significantly higher n and K uptake while Vermicompost @ 10 t ha-1 + PSB gave higher P uptake. Similarly, the application of Vermicompost @ 10 t ha-1 + biofertilizers had higher values of residual organic carbon and available N, P and Kin soil. All growth parameters and N, P and K uptake were found significantly positives correlated with fresh herbage yield as well as oil yield. Therefore, organic Lemon Tulsi (Ocimum basilicum L.) may be grown successfully with combined application of 10 t ha-1vermicompost and biofertilizers for higher herbage and oil yield with sustained soil fertility in Tarai region of Uttarakhand.
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    ThesisItemOpen Access
    Weed management in direct seeded unpuddled rice (Oryza sativa L.) under different sowing dates
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2008-01) Jitendra Kumar; Singh, Dheer
    A field experiment entitled “Weed management in direct seeded unpuddled rice (Oryza sativa L.) under different sowing dates” was conducted during kharif season of 2006 and 2007 at Crop Research Centre of G. B. Pant University of Agriculture and Technology, Pantnagar district U.S. Nagar (Uttarakhand) to evaluate the efficacy of different herbicides viz. butachlor @ 1.5 kg ha-1 (PE), pendimethalin @ 1.5 kg ha-1 (PE), pendimethalin @ 1.0 kg ha-1 + anilophos @ 0.4 kg ha-1 (PE), thiobencarb @ 1.5 kg ha-1 (PE), pretilachlor @ 0.75 kg ha-1 (PE), fenoxaprop-p-ethyl @ 0.06 kg ha-1(15 DAS) followed by 2,4-D @ 0.5 kg ha-1 (30 DAS), anilophos @ 0.4 kg ha-1 (10 DAS) and two hand weedings (20 and 40 DAS) under different sowing dates viz. 05 June, 20 June and 05 July and their effects on weeds, crop growth, yield and economics of rice. Weed free and weedy check were also included in the experiment. The field experiment was laid out in split-plot design with 3 replications. Rice variety “Govind” was sown in lines at 20 cm distance with recommended dose of fertilizer 120 kg N, 80 kg P2O5 and 60 kg K2O per hectare. Echinochloa colonum among grasses, Commelina benghalensis and Caesulia axillaris among non-grasses and Cyperus rotundus among sedges were the predominant weeds in experimental field. Uncontrolled weeds in weedy check plots caused on an average reduction in grain yield by 74.41 percent during 2006 and 67.43 percent during 2007 over weed free plots. The lowest weed population and dry weight were recorded in 05 July sown crop over rest of two sowing dates (05 June & 20 June). Highest yield attributes, grain yield (2488.5 kg ha-1 during 2006 and 2703.3 kg ha-1 during 2007) and nutrients uptake by crop plants was recorded in 20 June sown crop. Pre-emergence application of pendimethalin @ 1.0 kg ha-1 + anilophos @ 0.4 kg ha-1 and two hand weedings (20 and 40 DAS) produced highest grain yield during both the years. Pendimethalin @ 1.5 kg ha-1 and fenoxaprop-p-ethyl @ 0.06 kg ha-1 followed by 2,4-D @ 0.5 kg ha-1 also gave effective control of weeds and higher grain yield. Pendimethalin @ 1.0 kg ha-1 + anilophos @ 0.4 kg ha-1 applied one day after sowing found superior over all other herbicidal treatments in reducing population and dry matter of weeds and it lead to highest grain yield which ultimately fetched highest net return during both the years.