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Articles by S.M. Alam
Total Records ( 4 ) for S.M. Alam
  S.M. Alam , S.A. Ala , A.R. Azmi , M.A. Khan and R. Ansari
  Not available
  Shirazi M.U. , B. Khanzada , S.M. Alam , R. Ansari , S.M. Mujtaba , Muhammad Ali , Mukhtiar Ali and M.A. Khan
  Nutrients variation studies were conducted to understand the nutrient cycle (particularly nitrogen, phosphorus and cations) in four year old Acacia plantation ( Acacia nilotica and Acacia ampliceps) and the impact of salinity on nutrient cycling. Leaf samples were collected around the umbrella of 10 trees of each Acacia for nutrient content at the interval of two months. Soil salinity in the immediate proximity of the tree trunk was also monitored. Analytical results showed that both the species had adequate amount of nitrogen and phosphorus. Potassium was also near the critical levels. However, the Ca content was comparatively higher, which might be due to presence of organic acids during decomposition of organic residues present at the soil surface. Studies on monthly variation in mineral elements suggested that only single time period for sampling to study the nutrient status or scheduling time of fertilizer application is not appropriate. Therefore, the best time for studying nutrient status and fertilizer application would be during March-April or September-October, when the weather is mild and salinity is moderate.
  S.M. Alam , Zafar Iqbal , A. Latif and M. Akhtar
  Pot experiments were conducted to compare DCP, an industrial bye-product, against standard fertilizer SSP for growth and P uptake behaviour and to evaluate the performance of DCP as a P fertilizer source for several crop species. Single superphosphate and DCP were applied @ 0, 22, 44, 88, and 176 mg P kg -1 to a loam soil (Lyallpur III series, typic ustocrept). The first crop series grown were wheat, lentil and chickpea while the second series contained sorghum, maize and mungbean and in third series bermuda grass, brassica and berseeem were used. After each crop harvest soil samples were drawn for P analysis and the same P rates from two sources were applied to respective pots. Plants were grown for various time periods before harvesting and P uptake was estimated. Rate of P application increased DMY and P uptake, but the P rate required for maximum DMY varied depending on crop requirements. Brassica, bermuda grass and mungbean were less responsive to applied P while berseem, maize and sorghum responded more to P application. The behaviour of the two sources for DMY and P uptake by the six crop species were mostly alike. However, for crops that responded more to P application, DCP proved similar or sometimes superior to SSP. The amount of residual P after each crop harvest was significantly higher in DCP as compared to SSP applied treatment.
  M.A. Khan , S.M. Alam , S.S.M. Naqvi , S.A. Ala , M.H. Naqvi , S. Mumtaz , A. Shereen , M. Ali , M.U. Shirazi , Mukhtiar Ali and B. Khanzada
  An experiment was conducted in Plant Physiology Division at NIA, Tandojam, to find out a suitable growing technique for germination and seedling growth of wheat (Triticum aestivum L.). Techniques used were: I) Inclined glass plate blotter, ii) Agar gel medium and iii) PVC Germinator. There were no significant differences among the three planting methods on the germination and seedling growth of wheat. However, PVC Germinators were convenient and inexpensive compared with the agar gel and inclined glass plate blotter methods.
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