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Articles by Muhammad Ayyaz Khan
Total Records ( 7 ) for Muhammad Ayyaz Khan
  Muhammad Ayyaz Khan and Iqtidar Hussain
  Combined application of chemical fertilizer with farmyard manure increased the ears m -2 and grains per ear than alone application of organic or inorganic fertilizer to wheat variety Ghaznavi under the agro-climatic conditions of D.I.Khan, NWFP, Pakistan however both parameters i.e. ears per emerged seedling and grains per ear remained lower than the predicted yield in Ayah No. 261 of Surah Al-Baqrah of The Holy Quran. This variety produced the grain yield of 5.5 t ha -1 when fertilized with 20 t ha -1 FYM + 138 kg P2O5 t ha -1. Unfortunately this grain yield is far below than the grain yield (Y=axb) predicted in The Holy Quran which comes about 70 t ha -1. Therefore, it is suggested for the agricultural intellectuals to evolve varieties and agronomic techniques to achieve the grain yield predicted in The Holy Quran.
  Muhammad Ayyaz Khan and T.H. Flower
  The selection of a suitable extractant for measuring available nutrients in the algal pond effluent was the aim of this study. Chemical composition of elgal pond effluent in relation to its ability to supply plant available nutrients was evaluated using four extracts. The results revealed that ammonium phosphate and potassium should be measured in 0.1 M HCI extracts while nitrite and nitrate can be measured by direct filtration.
  Muhammad Ayyaz Khan , Ghazanfar Ullah Sadozai and Khalil Ahmad
  The experiment was conducted to study the effect of sowing rates on the yield components and grain yield of wheat variety Punjab-98 at Agronomic Research Area, Faculty of Agriculture, Gomel University, Dora Ismail Khan during 1998-99. All sowing rates had significant effect on tillers per plot. Sowing rates higher than 100 kg ha–1 increased tillers over low seed rate of 50 kg ha–1. High sowing rates than 100 kg ha–1 did not show any significant effect on spike length over low seed rate (50 kg ha–1). Low seed rate produced more number of grains per spike over high seed rates. Sowing rates from 50 kg ha–1 to 500 kg ha–1 had no significant effect on 1000-grain weight. The highest seed rate did not produce the highest biological yield mainly due to plant competition for nutrients, light and air. The lowest biological yield in case of low seed rate was merely due to low plant population. The grain yield was decreased by using seed rate above 250 kg ha–1. The highest grain ratio towards total dry matter production was found in plots sown at low seed rate (50 kg ha–1) which can be attributed to more grains per spike. There was positive correlation between yield components and grain yield.
  Muhammad Ayyaz Khan , Khalil Ahmad and Jamil Ahmad
  Effect of various levels of potassium on the yield of sunflower (Helianthus annuus L.) was studied at the Agronomy Research Area, Gomal University, D.I. Khan, during autumn 1997. The highest 1000-seed weight (53.71 g) was obtained from the plot, fertilized with 150kg potassium ha–1, while the minimum 1000-seed weight (46.41 g) was obtained in common plots. the highest seed yield (4153 kg ha–1) was also obtained in plots where 150 kg potassium per hectare was applied. The lowest seed yield was recorded in control plots (3402 kg ha–1). It can be suggested from these results that potassium. can be applied up to 150 kg ha–1 to obtain high seed yield of sunflower and to maintain the fertility regarding potassium I in the soil of D.I. Khan.
  Muhammad Ayyaz Khan , Shahid Akbar , Khalil Ahmad and Muhammad Safdar Baloch
  The performance of six corn hybrids i.e. C-922, C-7878, C-7777, C-7877, P-3163 and R-4208 was evaluated for grain yield. The Pioneer hybrid P-3163 produced the highest plant height cob length (16.05 cm) and 1000-grains weight. The corn hybrid C-7777 produced the highest plant stand and grain yield (7.25 t ha–1) while the number of cob per plant (0.945) and number of grains per cob (518.1) were maximum in C-7877. The corn hybrid R-4208 proved to be inferior variety regarding the yield and yield components.
  Muhammad Ayyaz Khan and T.H. Flower
  Solutions of 10 amino acids in water, 2M KCI and 0.5M K2S04 were analysed to determine their possible interference using the Berthelot colour reaction. The results confirmed the suspicion that amino acids present in samples analysed by colorimetric methods could result in over or under estimate of NH4-N in soils. All amino acids showed positive interference at zero NH4-N concentration. However, these amino acids in water and soil extracting solutions (2 M KCI and 0.5 M K2S04) showed negative interference at 1 mg l–1 NH4-N.
  Muhammad Ayyaz Khan and T.H. Flower
  Solutions of three amino acids (serine, glycine and proline) were analyzed under varying reaction conditions for their interferences in ammonium-N determination using the Berthelot indophenol colour reaction. The results regarding the changes made in the reaction conditions revealed that freshly prepared reagents should be used in studies investigating interferences by amino acids. Room temperature should be stable or reagents bottles should be placed in a water bath having a constant temperature of 25°C. The hypochlorite reagent should be freshly prepared at a concentration of 50 ml l–1.
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