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Articles by Rahmat Ullah Khan
Total Records ( 8 ) for Rahmat Ullah Khan
  Rahmat Ullah Khan , Abdul Ahad , Abur Rashid and Ahmad Khan
  A field trial was conducted to determine the optimum row spacing for chickpea crop for its better plant development to obtain maximum seed yield under the rainfed condition of Dera Ismail Khan. All the row spacing influenced the seed yield but use of narrow spacing of 30 produced significantly maximum yield of 2994, 2392 kg/ha whereas lowest yield 1834 and 1441 kg/ha obtained by wider spacing of 70 cm both the year respectively. The said treatment also produced the greatest 1000 seed weight.
  Rahmat Ullah Khan , Abdul Rashid and Ahmad Khan
  Field experimets were conducted during 1993-94 and 1994-95 to determine the effect of removing the top growth at different level on green fodder and seed yield of chickpea c.v. NIFA-88. Seed yield was significantly reduced by cutting the top growth while production of green fodder obtained according to the cutting level produced a maximum green fodder but lowest seed yield. The green fodder yield was maximum during 1994-95 as compared to the fodder yield obtained during 1993-94 and 1994-95. It may be the result of uniform rainfall distribution during the crop growth season and bumper vegetative growth of the crop during 1994-95. The maximum grain yield of 2483 and 2263 kg ha–1 were obtained from the uncut/ungrazed crop during 1993-94 and 1994-95 respectively.
Also plant height, number of pods per plant were reduced and the maturity was delayed by cutting as compared to solid crop apart from seed weight.
  Rahmat Ullah Khan , A. Amir and G. Sarwer
  Field experiment was carried out on wheat crop during 2000-01 to determine the effect of topping in local and improved cv. Inqilab-91 at different stages for fodder and then after re-growth on seed yield. Topping level in wheat at tillering stage significantly produced a maximum green fodder of 13510 kg ha–1 followed by wheat topped at 6-8 leaf stage with a fodder of 8750 kg ha–1, whereas improved cv. Inqilab-91 gave a maximum green fodder of 8433 kg ha–1 and 7750 kg ha–1 at said stages. Plant height, spike length and grains spike–1 were significantly reduced with topping in both the varieties except tiller plant–1. Maturity was delayed 3-5 days in local wheat variety whereas 7-9 days in improved c.v. Inqilab-91 as compared to control (un-cut), respectively. Concerned to seed yield 2-3 fold reduction occurred in local wheat whereas in improved c.v. Inqilab-91, yield did not differ significantly between control (un-cut) and when it was topped at 6-8 leaf stage but 2 1/2 fold yield reduced, when it was topped at tillering stage. Although local wheat variety gave maximum green fodder but it yield was severely reduced than improved wheat c.v. Inqilab-91.
  Rahmat Ullah Khan , Abdur Rashid , Zulfiqar Ali and Muhammad Sohail Khan
  This study was conducted to determine the effect of water supply at critical growth stage of sorghum in Arid Zone Research Institute, D.I. Khan. The results indicated that the yield components and grain yield were significantly affected by water supply. Irrigation applied at heading stage of the crop significantly increased plant height, maturity period, fresh and dry weight of heads plot-1, 1000 grain weight and grain yield of sorghum irrespective to cultivars. Maximum grain yield of 3319 kg ha-1 was obtained with irrigation as against 2206 kg ha-1 obtained from un-irrigated treatments. The plant height, fresh and dry weight of heads plot-1, 1000 grain weight and grain yield of different cultivars were also different significantly irrespective to irrigation. Maximum grain yield of 2976 kg ha-1 was produced by the cultivar DS-2000 compared to 2550 kg ha-1 by DS-97 Yarik. The interaction between irrigation and cultivar as regards yield and yield components of sorghum was non significant. The findings of this study suggested that the grain yield of sorghum can be increased by 50% with irrigation applied at the heading of sorghum.
  Rahmat Ullah Khan , M. Fayyaz Chaudhary and H. Henning Muendel
  A field experiments were conducted at NARC, Islamabad during 1988-89 and 1989-90, with Waster rapeseed (Brassica napus L.) to determine the effect of topping at different growth stages on seed quality. Topping treatments included an untopped check, the removal of three-quarters of the top growth at each of pre-bud, bud and first flower, as well as removal of all secondary branches at first flower. Although topping showed positive response on oil content (%) in seed in all trials which ranged 43.9 to 48.0% which appeared non significant on erucic acid and glucosinolates in the seed.
  Rahmat Ullah Khan , Matiullah Khan , Taj Naseeb Khan and Jahangir Shah
  Field experiments were conducted during 1999-2000, 2000-2001 to find out the effect of removing the top growth at different level on green fodder and seed yield of c.v. NIFA-88. Cutting of plants at ½ level appeared the best treatment with a seed yield of 4137 and 2095 kg ha‾1. Over the other treatments apart from 2/3 level of cutting seed yield of 3543 and 2072 kg ha‾1 as compared to control (un-cut) treatment yield of 3201 and 1973 kg ha‾1 both the year, respectively. The green fodder obtained according to the cutting level of plant but the said treatments also gave an additional benefit of green fodder of 4950 to 5550 and 3472 to 5347 kg ha‾1 without involvement of any extra cost of cultivation. Plant height and number of branches per plant were influenced by cutting levels whereas pods/plant and 1000 seeds weight did not differ significantly. Increase in seed yield may be the result of bearing more number of branches and pods per plant by the said treatment, which could easily matured within the available duration. The severe cutting of ground level gave maximum green fodder both the years but lowest seed yield during 1999-2000 whereas in 2000-2001 after cutting, plant stand severely affected due to prevailing of foggy weather along with cold temperature remained in late December to mid January and later on crop completely failed to be recorded yield data.
  Rahmat Ullah Khan , Amir Ahmed , Taj Naseeb Khan and Ghulam Sarwar
  Field experiments were conducted during 1999-2000 and 2000-2001 to assess the effect of improved Vs traditional practices on the seed yield of improved chickpea cvs NIFA-88 and local.(Desi). Yield components i.e pods per plant, 1000 seed weight and seed yield obtained with improved cv. NIFA-88 and practices was significantly higher than local variety with traditional practices booth the years respectively. Although plant height and branches per plant did not differ significantly but generally increased occurred with improved practices. The yield increase over traditional practices appeared 7 to 27% both the years which may have been results of the joint impact of the improved practices thus, the use of improved chickpea cv. "NIFA-88" with proper managed practices i.e one deep-plough before moon soon rain and then disc harrowing after rain before sowing of crop, using a fertilizer @ (20-50 NP kg ha-1) broadcast and incorporated with rotavator and seed rate of 75 kg ha-1 treated with vitavax-200 @ 2 gm kg-1 proved to be the recommended technology for obtaining maximum seed yield under the Rodh-kohi condition.
  Rahmat Ullah Khan , Abdur Rashid and Taj Naseeb Khan
  The field experiments were conducted at Arid Zone Research Institute, D.I. Khan during 1999-2000 and 2000-2001. The objectives of the experiments were to evaluate the effect of improved practices versus local practices on the seed yield of wheat . Yield components i.e; plant height, spike length and grains spike-1 were affected significantly except tillers plant-1 and 1000 seed weight with approved practices. Also grain yield of wheat obtained with improved practices was significantly great than the yield obtained from the local practices both the year respectively. This increase of wheat over the local practices was reported 22 and 33 % both the years which may have been the results of collective impact of improved practices. Thus, the use of improved wheat variety "Inqilab-91" with proper management practices i.e., two ploughing for land preparation before sowing of crop using a seed rate of 110 kg ha-1, fertilizer rate (60-40-0 N-P kg ha-1) and seed treatment with vitavax-200 @ 2.0 g kg-1 seed can be recommended to obtain maximum wheat yield under Rod-Kohi condition.
 
 
 
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