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Articles by Khurram Bashir
Total Records ( 5 ) for Khurram Bashir
  M. Ehsan Akhtar , Khurram Bashir , M. Zamir Khan and Khalid Mahmud Khokhar
  An experiment was conducted to study the effect of applied potassium fertilizer on three bulb sizes (10-15, 15-20 and 20-25 mm) of five varieties of onion at the National Agricultural Research Centre (NARC), Islamabad during 1999. Nitrogen and phosphorus were applied @ 150 N and 100 P2O5 kg ha -1 as basal fertilizers. Potash was applied @ 200 kg K2O ha -1. The positive effect of applied K was noted on all the varieties of onion. Maximum yield of 61.11 t ha -1 was obtained when K was applied along with N and P to Phulkara variety of bulb size 15-20 mm. The lowest yield of 12.03 t ha -1 was observed in no- K fertilizer treatment in Swat No. 1 of bulb size 20-25 mm. It was observed that the application of K @ 200 kg ha -1 along with N and P fertilizers significantly increased the yield of all varieties of onion irrespective of seedling bulb sizes.
  M. Ehsan Akhtar , M. Zameer Khan , Sagheer Ahmad and Khurram Bashir
  A pot experiment was conducted to investigate the effect of K application on Shujabad and Missa soil series on six wheat cultivars. Nitrogen and P were applied @150 mg N and 75 mg P2O5 kg-1 with two levels of K (0 and 150 mg K2O kg-1) as muriate of potash. Relatively large quantities of shoot biomass were produced in Missa than Shujabad soil. Irrespective of soils and cultivars, the application of K increased shoot biomass of all the cultivars except NR-37. In Shujabad soil, Rawal-87 and in Missa soil Inqlab-91 had higher nitrogen while Sariab-92 and Chakwal-86 the minimum on Shujabad and Missa soils, respectively. The potassium contents of all the wheat cultivars increased with the addition of K fertilizer. Maximum K was found in Chakwal-86 while minimum in Sarib-92. It was observed that Sariab-92 had much less Cl¯ content than the other cultivars, however its biomass increased with MOP application as compared to control whereas NR-37 had the maximum Cl¯ contents. Nitrogen, P, Mg and S in most of the cultivars decreased over the control. The results showed that the behavior of wheat cultivars and their response to K application differed on two soils.
  Maqbool Akhtar , M. Ehsan Akhtar , Khurram Bashir and Shahid Rafiq Ch
  A field experiment was conducted to study the effect of various nitrogen levels (0, 75, 150 and 225 kg ha-1 ) on agronomic characters, productivity, maturity and nutrient contents of sugarcane at the National Agricultural Research Centre Islamabad during 1996-98. All the treatments were given a constant dose of 120 kg ha‾1 of P2O5 and 150 kg ha‾1 of K2O. Early stalk population increased as the N dose was increased. Maximum number of tillers per hectare were found at 225 kg N ha‾1 at all growth stages. Similarly at harvest, millable canes per hectare were the maximum (139.7 thousands) at 225 kg N ha‾1. Stalk height increased significantly as the N levels were increased and it was the maximum (264.67 cm) at N level of 225 kg ha‾1. Nitrogen also increased stalk girth significantly. Brix percentage was similar at early maturity stages at all N levels, however, at harvest it was significantly lower in N applied plots than the control. Cane yield increased significantly with increasing N levels with the maximum (149.4 t ha‾1) at 225 kg N ha‾1. Although sugar recovery was maximum (11.8 %) in the control plots but it was statistically similar to other treatments. Application of 225 kg N ha-1 produced the maximum sugar yield of 16.87 t ha‾1. Phosphorus, K, Zn, Mg and B contents in the plant tissue increased significantly with increasing N application levels.
  Khurram Bashir , Muhammad Rafiq , Tahira Fatima , Tayyab Husnain and Sheikh Riazuddin
  In present studies, level of toxicity of hygromycin was optimized for local inbred line of maize (Zea mays L.). The immature embryos were isolated and cultured on N6 media modified with 1.0 mg L-1 2,4-D, 25 mM L-Proline and 100 mg L-1 Casein Hydrolysate and containing different concentrations of hygromycin. These immature embryos were observed for callus formation on working concentrations of 0, 20, 40, 60, 80, 100 and 120 mg L-1 hygromycin. The results showed that 97.3 38.5 and 32.5% calli survived on media containing 0, 20 and 40 mg L-1 hygromycin. Hygromycin concentration of 60 mg L-1 and above was effective for BR-6 as no callus formation was observed at this concentration or the immature embryos were completely dead. It was also observed that although 32.8% calli survived on media containing 40 mg L-1 hygromycin, these calli were slower in growth, smaller in size and pale in color as compared to calli containing (hph) gene on same media. On the basis of these results 40 mg L-1 hygromycin seems suitable for identification of putative transformants.
  Maqbool Akhtar , Khurram Bashir , M. Ehsan Akhtar , M. Zameer Khan and Shahid Rafiq Ch.
  A field experiment was conducted to study the effect of timing of the last dose of split nitrogen application on agronomic traits and nutrient contents of sugarcane. The study was carried out at the National Agricultural Research Centre Islamabad during 1996-97. Application timing of the last dose of nitrogen did not affect early stalk population, millable canes, stalk height, stalk girth and total soluble solids (TSS). Application of last dose of N at early stage (last week of March) produced significantly lower cane yield than other timings of N application. Maximum cane yield of 146 t ha–1 was produced when the last dose of N was applied during the first week of June. Cane yield produced with the application of last dose of N either the mid May or the first week of July produced statistically similar cane yield that was produced with the application of last dose of N during first week of June. Sugar recovery was significantly decreased with the late application (July 1st week) of the last dose of N. Maximum sugar yield (15.70 t ha –1 ) was produced when the last dose of N was applied during the middle of May. P, K, Zn and B contents were not affected with the timing of application of nitrogen. However, Mg contents of the tissue increased significantly as the application of the last dose of nitrogen was delayed.
 
 
 
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