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Articles by Amir Zaman Khan
Total Records ( 2 ) for Amir Zaman Khan
  Amir Zaman Khan , H. Khan , Adel Ghoneim , R. Khan and Azza Ebid
  The objective of present study was to evaluate the relationship between different planting dates, densities and cultivars on soybean seed germination and vigor of seeds from plant growing in the field. Seeds of two soybean cultivars (Epps, [MG] V and Williams 82, [MG] III) were produced in the field from four planting dates and three planting densities in Peshawar, NWFP-Pakistan during 2000 and 2001. Brown (mature) pods were harvested, threshed and all shriveled and abnormal seeds were removed before determining standard germination and other vigor tests. Standard germination and other vigor tests decreased linearly (R2 = 0.53) from early planting dates to delay planting dates. Similar trend of decrease was observed from low planting density to high planting density. The decrease in AA was curvilinear (R2 = 0.78) and germination reached 15% in May planted crop. Seeds of Williams 82 was more sensitive to high temperature stress than seeds of Epps and seed vigor (AA) were much more sensitive to high temperature stress than was standard germination. Present findings support the results of experiments in controlled environments by demonstrating that high temperature during seed filling in the field, without seed infection with P. longicolla or physical injury, reduced soybean seed germination, vigor and all quality parameters of soybean seed under temperate environment.
  Amir Zaman Khan , H. Khan , R. Khan , Adel Ghoneim and Azza Ebid
  To evaluate the effect of different wheat seed categories with farmer’s seed for yield and yield components. An experiment was conducted at Agriculture Research Farm, NWFP Agricultural University, Peshawar, during 2003-04. The experiment was laid out in Randomized Complete Block (RCB) design with four replications. The seed categories were pre-basic, basic and certified seed of wheat varieties Bakhtawar-92 and Fakhri Sarhad from CCRI, Pirsabak and were compared with farmer’s seed of the same varieties collected from 4 location of the province. Maximum emergence m-2 (183) was recorded from pre-basic seed of Bakhtawar-92 and Fakhri Sarhad collected from CCRI, Pirsabak followed by basic and certified seed category of the same location. Farmer’s seed collected from Peshawar locality gave minimum emergence m-2 (73) among different seed categories. Pre-basic cateroy of Bakhtawar-92 obtained from CCRI, Pirsabak gave maximum spikes m-2 (347.3), grains spike-1 (52.30), biological yield (11500 kg ha-1), grain yield (4931 kg ha-1), thousand grain weight (52.75 g) and harvest index (43.11%), followed by basic and certified categories of the same varieties and location. Among farmer’s seed, Bakhtawar-92 collected from Charsadda and Nowshera locality performed better in all yield parameters as compared to other locations. Farmer’s seed collected from Peshawar and Mardan performed poorly in maximum yield parameters. It is concluded that pre-basic seed of Bakhtawar-92 and Fakhri Sarhad obtained from CCRI, Pirsabak showed better performance in all agronomic parameters and may be recommended for higher production under the agroclimatic conditions of NWFP-Pakistan.
 
 
 
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