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Articles by Muhammad Yaseen
Total Records ( 2 ) for Muhammad Yaseen
  Nisar Ahmad , Abdul Razzaq and Muhammad Yaseen
  A laboratory experiment was conducted to study the phosphorus adsorption and desorption characteristics of Pindorian, Satghrah, Shahdara, Wazirabad, Balkassar, Hafizabad and Missa soil series of Pakistan. Surface soil samples of these soil series were collected and analysed for EC, pH, OM, CaCO3, and texture. Five levels of P (50, 100, 200, 400 and 800 ug P/g of soil) were added to these samples and were shaken for 24 hours and got filtrate after centrifugation. The amount of desorbed P was determined by using NaHCO3 solution as an extractant. The soils with high amount of CaCO3 or clay or both adsorbed larger amounts of added P than the soils having the lower amounts of CaCO3 or clay or both. Similarly, the soils with more CaCO3 released the adsorbed P in lower amounts as compared to the soils having less CaCO3 contents. The order of P adsorption by these soils were: Missa> Hafizabad> Balkasser> Pindorian> Satghrah> Shahdara> Wazirabad and the order of desorption were just reverse to it. Although the total amount of adsorbed P increased with increasing P application but the recovery of adsorbed P remained almost same at each level of P application.
  Zaheer Ahmad , Muhammad Aslam , Maqsood Ahmad Gill , Muhammad Yaseen and Hamud-ur-Rehman
  Soils of Pakistan are frequently characterized as deficient in plant-available phosphorus (P). The option of fertilizer applications to cope the situation has proved cost-intensive for resource-poor farmers of the country. Under the circumstances, exploitation of genetic variations in crops for P-use efficiency and identification of P-efficient crop cultivars hold great promise. Experiments conducted at the University of Agriculture, Faisalabad indicated significant growth differences among varieties of wheat, rice, chickpea and cotton when grown under P-deficient as well as P-adequate conditions. Differences in relative adaptability of varieties to P-deficiency stress were also considerable. In this paper, work done in Pakistan and elsewhere on genotypic variations of P-nutrition of crops is briefly reviewed. Various physiological mechanisms responsible for such variations are also discussed.
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