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Articles by Tahir Hussain Chattha
Total Records ( 2 ) for Tahir Hussain Chattha
  Mateen-ul-Hassan Khan , Tahir Hussain Chattha and Rifat Hayat
  A field experiment was carried out at the Vegetable Research Farm of University of Arid Agriculture, Rawalpindi, during March, 2004 to evaluate the performance of tomato (Lycopersicon esculentum L.) under effect of organic and inorganic mulches. The treatments selected were control (control), mulching with 4 inch thick grass, mulching with 4 inch wheat straw, black polyethylene mulch (160 μm gauge) and transparent polyethylene mulch (150 μm gauge). The result reveled that maximum plant height 93 cm and maximum number of leaves 160 was observed in plot mulching with 4 inch wheat straw. Where as, maximum leaf area plant -1 65 cm2 was produced with transparent polythene mulch 150 μm gauge. Maximum number of flower cluster and fruit plant-1 were recorded in plot with mulches 4 inch thick grass. Maximum yield 96.45 t ha-1 of tomato was obtained with mulching of 4 inch wheat straw while; minimum yield 55.41 t ha-1 was obtain in control. Wheat straw increases 43% tomato yield when compared with control. There was non-significant variation among different treatment as for as soil physical and chemical parameters are concerned. However, mulching treatment conserved 27% more moisture as compare to control. Economic comparison indicates that wheat and grass mulch were more efficient than expansive polythene mulch.
  Tahir Hussain Chattha , Mateen ul Hassan Khan and Muhammad Imran Latif
  A study was conducted in different districts of Potowar region to evaluate the quality of sewage for irrigation purposes and heavy metal contents in sewage water. Sewage samples were collected from 25 sewage irrigated farms around Rawalpindi, Attock and Abotabad districts. Electrical conductivity of the samples ranged from 0.55-2.36 dS m-1. Sixty percent of the samples did not pose salinity hazard while forty percent were marginally fit for irrigation. Sodium adsorption ratio ranged from 0.24 to 4.36 showing that all the samples were low in Na contents. RSC varied from 0.0-8.1 mmol L-1 in the sewage samples under study; 59% of the samples had < 2.0 mmol L-1 of RSC showing that sewage represented by these samples had no risk of NaHCO3 hazard when applied to soils. Chloride contents in the samples were in the range of 0.5 to 4.7 mmol L-1 and were within safe limits. Zn and Pb contents in the sewage of various locations were found within safe limits (< 2.0 and 5.0 mg L-1, respectively) while Cu, Cd, Ni and Cr concentrations were found to exceed the maximum permissible limits. The effluent of areas under investigation are mixture of both domestic and industrial wastewater, high levels of HCO3- from washing soaps and detergents and excess of heavy metals from different industrial sources were present in the effluent. Therefore, sewage irrigation may cause deterioration of soil quality by causing salinity and introducing excessive contents of HCO3- in soils and poses health hazards by increasing heavy metal contents in vegetables and crops.
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