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Articles by Muhammad Yousaf
Total Records ( 5 ) for Muhammad Yousaf
  Muhammad Yousaf , Amir Ahmad , M. Jahangir and T. Naseeb
  The objective of this study was to determine the response of canola to different sowing dates (SD) on growth and yield parameters of canola. The treatments included two canola varieties (Dunkled and Rainbow) and three sowing dates (11, 21 and 31st October (1999-2000). Dunkled variety planted on early sowing date (October 11) produced higher grain yield of 2111.05 kg ha-1 as compared to rainbow and late sowings, comparatively low seed yield of 1806 kg ha-1 was produced by sowing date of October 31. The different sowing dates effects significantly on number of primary branches/plant, number of secondary branches/plant, number of pods/plant and seed yield.
  Nazir Ahmad , Muhammad Abid , Khadim Hussain , Muhammad Akram and Muhammad Yousaf
  The study was carried out to assess the macro and micro nutrients status and their relation with pH, organic matter, clay contents and calcium carbonate (CaCO3) in the rice growing areas (Kallar track). Soil samples from 0-15 cm depth were collected from 45-50 sites located in this area. The soil samples were processed and analyzed for macro and micronutrients. Results indicated that 40% soil samples were deficient in total N, 17.77% P, 4.41% SO4, 60% Zn, 4.5% Cu and 13.33% Mn. The K, Ca+Mg, Fe and B were not deficient. About 15.15% were low in total N, 33.33 in P, 6.66% in SO42 -S and 22.22% in Zn and no one in K, Ca+Mg, Cu, Fe, Mn and B. Soil pH, organic matter, clay and CaCO3 contents were correlated with macro and DTPA (diethyletriaminepenta-acetic acid) extractable available micronutrients. Organic matter showed positive correlation with N (0.969**), whereas pHs correlated negative with Mn (-0.316*). Clay contents showed significant positive correlation with K (0.325*), Cu (0.372*) and B (0.269*). Similarly, significant positive correlation of CaCO3 was recorded with Cu (0.415*) and Mn (0.360*).
  Zafar Iqbal Khan , Altaf Hussain , Muhammad Ashraf , Hans- Werner Koyro , B. Huchzermeyer , Muhammad Yousaf and Muhammad Saeed Akhtar
  An investigation was conducted in central region of Punjab, Pakistan to study the relationship of mineral (Na) in soil, plantand animal systems to enable prediction of sodium status of three different classes of goats and sheep grazing the pasture. From goat and sheep ranch soil, forage, feed, waterand animal samples (Blood plasma, milk, faecesand urine) were collected fortnightly during winter and summer seasons. At goat ranch it was found that seasons did not affect soil, forageand plasma Na+ concentrations. These samples were lower than the required range in relation to Na+ levels. The fecal, urineand milk Na+ losses were found to be responsible for low plasma Na+ status in different goat classes. At sheep ranch soil, feedand plasma, milk and urine sodium concentrations in lactating sheep were affected by seasonal changes. Forage sodium level during summer was at marginal deficient and during winter it was slightly deficient. In lactating sheep plasma had marginal deficient level of sodium in winter and moderate deficient level in summer. While in non lactating sheep plasma sodium was also moderately deficient in summer and marginal deficient in winter and in male sheep moderately deficient level of sodium in plasma was found in summer only. Fecal and urine loss of sodium in lactating and non lactating animals was lower during winter than those during summer. Milk loss of sodium was found to be higher in winter than that in summer. From these results it is concluded that Na+ status of goats and sheep in this specific region needs supplementation with mixture of salt containing Na+ to enhance the Na+ levels of grazing animals.
  Zafar Iqbal Khan , Altaf Hussain , M. Ashraf , M.Y. Ashraf , Muhammad Yousaf , Muhammad Saeed Akhtar and Arshad Maqbool
  This article briefly describes common mineral imbalances affecting grazing ruminants at farms, their mineral requirements, factors affecting these requirements and different methods of detection of mineral status of the animal. The benefits and limitations of mineral analyses of soil, forage, animal tissues, and fluids samples for the purpose of identifying and preventing mineral disorders of grazing animals are discussed. The role of minerals as buffers, in immunity, as antioxidant and their bioavailability from various sources have also been described.
  Sohail Jamil Qureshi , Sofia Bano , Mir Ajab Khan , Muhammad Yousaf and Abdul Ghani Awan
  A study was conducted to investigate the phosphorus status of Tehsil Kahuta of district Rawalpindi. A total of ninety composite soil samples were collected from different sites. Out of ninety, 78 samples (87%) were found of poor (<5 mg k kg -1soil) level while 11 samples (12%) had satisfactory (5-10 mg k kg -1soil) level and 1 soil sample (1%) was found with adequate (> 10 mg k kg -1soil). The maximum phosphorus content 10.5 mg k kg -1 soil was recorded in Loona Kahuta site while minimum phosphorus 2.0 mg k kg -1 soil was recorded in Kalar Saidhan site. The Loona Kahuta site had maximum average potassium 5.5-mg k kg -1soil. Fertilizer recommendations were advised to farmers according to soil problems.
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