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Articles by Himayat Ullah Khan
Total Records ( 3 ) for Himayat Ullah Khan
  Mohammad Safdar Baloch , Inayat Ullah Awan , Gul Hassan , Himayat Ullah Khan and Khalid Abdullah
  The adults of rice stem borer were counted after 30, 45 and 60 days after sowing (DAS) during rice growing season of 2002 and 2003. It was observed that after 30 DAS the adults preferred resting on crop, planted on 20th and 27th of June with variable number of seedlings hill-1. Similar trend was observed after 45 and 60 DAS. Number of white heads plant-1 was higher in crop planted on 27th of June and 4th of July indicating the relationship. It was further noted that seedlings per hill has no affect on adult resting preference and white heads as well. The maximum paddy yield was noted in crop planted on 20th of June and 11th of July.
  Muhammad Sohail , Inayat Ullah Awan , Himayat Ullah Khan and M. Safdar Baloch
  A field trial was carried out to evaluate the effect of different seed rates on the production of direct wet-seeded rice. The coarse rice variety IR-6 was sown at seed rate of 40, 60, 80, 100, 120, 140, 160 and 180 kg ha-1. The results revealed that paddy yield, harvest index, net income and benefit-cost ratio was maximum at medium seed rate of 120 kg ha-1. A decrease in plant height at maturity, numbers of tillers per plant, number of panicles per plant, normal kernel (%) and progressive increase in sterility (%) and straw yield was observed with increase in seed rate from 40 to 180 kg ha-1. All the growth, yield and kernel quality attributes were economical and profitable at seed rate of 120 kg ha-1.
  Muhammad Subhan , Himayat Ullah Khan and Riazud Din Ahmad
  Significant differences among hybrids and their parents were noted. Th boll weight and staple length reflected additive type of gene action while in seed index and lint index, over-dominance gene action was observed. The non-significant deviation of regression line from unit slope indicates the absence of non-allelic interaction in staple length showing absence of epistatsis providing positive lines for isolating superior genotypes. Boll weight and lint index shows the significant deviation from unit slope which surely indicates the presence of opitstasis.
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