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Articles by G. Abbas
Total Records ( 2 ) for G. Abbas
  S.M. Mehdi , M. Sarfraz , G. Shabbir and G. Abbas
  Saline sodic soils after reclamation become infertile due to leaching of most of the nutrients along with salts from the rooting medium. Microbes can play a vital role in the productivity improvement of such soils. In this study a saline sodic field having ECe 6.5 dS m-1, pHs 9.1 and gypsum requirement (GR) 3.5 tons acre-1 was reclaimed by applying gypsum at the rate of 100% GR. Rice and wheat crops were transplanted/sown for three consecutive years. Inorganic nitrogenous fertilizer was used with and without biofertilizers i.e., Biopower (Azospirillum) for rice and diazotroph inoculums for wheat. Nitrogen was applied at the rate of 0, 75% of recommended dose (RD), RD, 125% of RD and 150% of RD. Recommended dose of P without K was applied to all the plots. Biopower significantly improved Paddy and straw yield of rice over inorganic nitrogenous fertilizer. In case of wheat diazotroph inoculum improved grain and straw yield significantly over inorganic nitrogenous fertilizer. Among N fertilizer rates, RD + 25% additional N fertilizer was found to be the best dose for rice and wheat production in recently reclaimed soils. Nitrogen concentration and its uptake by paddy, grain and straw were also increased by biopower and diazotroph inoculum over inorganic nitrogenous fertilizer. Among N fertilizer rates, RD + 25% additional N fertilizer was found to be the best dose for nitrogen concentration and its uptake by paddy, grain and straw. Total soil N, available P and extractable K were increased while salinity/sodicity parameters were decreased with the passage of time. The productivity of the soil was improved more by biofertilizers over inorganic N fertilizers.
  A.M. Musa , G. Abbas , A.B. Aliyu , M.S. Abdullahi and I.N. Akpulu
  Antimicrobial activities of the crude methanol extract as well as the n-butanol and residual aqueous fractions from the aerial part of Indigofera conferta used in traditional medicine to treat infected wound were investigated using disc diffusion and broth dilution techniques. The extract and the fractions were tested against Staphylococcus aureus, Bacillus subtilis, Pseudomonas aeruginosa, Escherichia coli and Candida albicans using Ampiclox as standard antibiotic. The crude methanol extract and the aqueous fraction exhibited activity against all the organisms tested (zones of inhibition 16-34 and 14-31 mm, respectively). The n-butanol fraction showed activity on Staphylococcus aureus, Bacillus subtilis and Pseudomonas aeruginosa only (zones of inhibition 14-25 mm). Phytochemical screening on crude extract revealed the presence of tannins, flavonoids and steroids. This study showed that the leaves of Indigofera conferta contains active compounds and its antimicrobial activity justifies its use in traditional medicine.
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