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Articles by Manzoor Ahmad
Total Records ( 6 ) for Manzoor Ahmad
  Manzoor Ahmad
  The experiment was conducted on SARC-1 wheat in plastic pots in solution culture. Two salt-stress levels (0 mol m–3 NaCl (control) and 100 mol m–3 NaCl), and two pH levels (pH 5.8 and 8.5) were tested. Salt stresses were created by adding calculated amounts of commercial NaCl to the nutrient solution. pH 8.5 was created by adding 1.0 M KOH. Data provide some evidence that the effects of salinity on net photosynthesis (Pn) and growth were greater at high pH than at low pH. Percentage decreases in root, shoot weight and leaf area due to salinity were greater at high pH than at low pH. pH 8.5 in combination with 100 mol m–3 NaCl proved very harmful for gas exchange and plant growth.
  Manzoor Ahmad and Faqir Muhammad Azhar
  The analyses of genetic correlation and path coefficient were made using 56 F2 families and their 8 parents of G. hirsutum L. It was revealed that number of bolls and lint percentage had positive and significant relationship with seed cotton yield, boll weight, lint index, staple length and fibre fineness. Boll weight showed strong association with lint percentage, fibre fineness and plant yield. Staple length and fibre fineness exhibited positive correlation with plant yield. Oil and protein contents were positively related with almost all the characters studied in the present investigations. Path analysis revealed that number of bolls and boll weight made the greatest contribution towards seed cotton yield. In addition boll weight, lint percentage, lint index, staple length, fibre fineness and protein content also affected plant productivity through number of bolls. However oil content contributed via boll weight.
  Aman Ullah Salarzai , M. Maqsood , Aftab Wajid , Naeem Shawani and Manzoor Ahmad
  Evaluation of different Herbicides for the control of weeds in wheat was conducted at the area of Adaptive Research Model Farm Quetta, during the year 1997-98. Five different Herbicides were applied at recommended commercial rates. The highest 1000-grain weight (46.32 gm) was recorded with application of T6 (Banvel-M) which was statistically at par with T1 (Buctril-M) 45.25 gm 1000-grain weight. Weedicides significantly affected the weed population, weed biomass, an various yield components. The highest grain yield 5030 kg ha–1 was obtained in plots treated with Banvel-M close to it 5010 kg ha–1. Buctrial-M yield, as compared to control 4195 kg ha–1.
  Nazir Hussain , Manzoor Ahmad , M. Salim and A. Ali
  The experiment was conducted in the field on a normal soil. Brackish tube well water was used for irrigating wheat and rice crops without any amendment and with gypsum (equal to sodium contents of irrigation water and two times its sodium contents). Wheat and rice crops were grown from Rabi 1995-96 to Rabi 1998-99. Grain and paddy yield along with Electrical Conductivity (EC), Sodium Adsorption Ratio (SAR) and pH of the soils were recorded. Use of brackish water without any amendment resulted in an increase in EC and SAR of the soil and caused a decrease in crop yield. Use of the same water in combination with two times its sodium contents resulted in normal yield of both the crops without any harmful effect on the soil. Gypsum equal to sodium contents of the irrigation water proved comparatively less effective.
  F.M. Azhar and Manzoor Ahmad
  Genetic analysis of F1 and F2 data obtained by crossing eight parents in diallel fashion was made following simple additive dominance model, in order to study the type of gene action controlling variation in oil content in Gossypium hirsutum L seed. The parents and 56 hybrids differed significantly from each other for oil content. Estimation of genetic components of variation showed that non additive genes controlled oil content in F1 generation and the genes with additive properties appeared to be important in F2 generation, with varying degrees of dominance in both the generations. Dominance acted towards the parents with higher oil content. Depending upon the magnitude of additive gene effects estimates of heritability in narrow sense were moderate in F1 and high in F2. The presence of additive genes effects and high estimate of heritability of oil content in F2 generation suggest that prompt and effective progress in oil content may be made following recurrent selection method.
  Waqar Ahmad , Taous Khan , Bashir Ahmad , Zafar Iqbal , Mansoor Ahmad , Manzoor Ahmad , Qasim Jan and Muhammad Arfan
  The seed oil of Abroma augusta Linn., extracted with n-hexane, was studied for chemical composition. The fatty acid composition of the oil was determined using Gas Chromatography-Mass Spectrometric (GCMS) technique. Out of six identified fatty acids, four were saturated (66.6%) and two were unsaturated (33.3%). The structures of various fatty acids were confirmed on the basis of comparison with those reported in literature.
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