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Articles by A.W. Amin
Total Records ( 3 ) for A.W. Amin
  A.W. Amin , M.M. Migahid , R.F. El-Bakatoshi and L.M. El-Sadek
  Molecular characterization of Plantago albicans L. accessions in sites of different edaphic characters in the north western Mediterranean region of Egypt was carried out to assess the range of genetic diversity of this species. The results indicated the necessity of using all types of data together to clarify the interpopulation relationships. Populations I (Burg El-Arab) and II (Omayed) were suggested to be two different varieties of P. albicans (variety "Typica pilger" of subspecies albicans and variety "nana" respectively). Population II was considered endangered and needs urgent conservation. Population VIII (Ras El-Hekma) was considered an ecotype.
  A.W. Amin , F.K. Sherif , H. El-Atar and H. Ez-Eldin
  A field experiment was conducted to evaluate the effect of using sewage sludge as an organic fertilizer on different yield parameters of maize. Generally, different rates of residual applications of sewage sludge increased heavy metal concentrations in the soil before sowing and after harvesting of Zea mays. Leaf and grain contents of heavy metals were affected by sludge addition except for Cd. In general, the residual one addition of sludge decreased heavy metals contents except Pb. While, the residual two additions increased the concentrations of heavy metals except Cu. Sludge treatments did not affect some plant yield parameters. Increased germination percentage and number of ears per treatment were recorded. The dry weight of leaves increased except at 10 and 40 T/F for one residual addition and 20 and 30 T/F for two residual additions. Mature plant height, number of tillers/plant and dry weights of leaves either increased or decreased for different treatments of sludge. The kernel index decreased in all sludge treatments. Sludge treatments affected the M2 kernel characters of maize, such as inducing yellow kernels, different colored patches in aleurone layer and non-pitted and shrunken kernels. Therefore, the use of sewage sludge as biofertilizer must be applied after pre-treatment to reduce heavy metals in order to decrease the rate of point mutations affecting kernel germination, color and shape and some yield products.
  A.W. Amin , F.K. Sherif , H. El-Atar and H. Ez-Eldin
  Field experiments were conducted to evaluate the effect of using sewage sludge as organic fertilizer on different cytological and yield parameters of Vicia faba. Sewage sludge treatment rates were 0, 10, 20, 30 and 40 T/F and applied to the soil in three successive additions during 1999-2001. Different rates of residual and repeated application of sewage sludge increased heavy metals concentrations in the soil before sowing and after harvesting of Vicia faba. Sludge treatments did not affect some yield parameters, but mature plant height and number of tillers/plant were increased or decreased at different treatments of sludge. The seed index and fresh and dry weights of shoots and roots were increased. The number of seeds/pot recorded the highest value by 10 T/F of the one residual addition, while the lowest value was obtained at 20 T/F two additions. Also, sludge treatments increased mature plant height, seed index, seed density, the number of nodules/plant and fresh and dry weights of nodules except at the highest treatments of two and three additions. Generally, it decreased nodules efficiency percentage. The root tolerance index was increased by sludge treatments. The sludge treatments increased the mean mitotic index and those of three cumulative additions were higher than that of one residual addition treatment. Sludge treatments included a number of abnormalities in all mitotic phases and non dividing cells. The percentage of abnormal cells was increased by three cumulative additions treatments than the one residual addition.
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