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Articles by Azza Ebid
Total Records ( 5 ) for Azza Ebid
  Amir Zaman Khan , H. Khan , Adel Ghoneim , R. Khan and Azza Ebid
  The objective of present study was to evaluate the relationship between different planting dates, densities and cultivars on soybean seed germination and vigor of seeds from plant growing in the field. Seeds of two soybean cultivars (Epps, [MG] V and Williams 82, [MG] III) were produced in the field from four planting dates and three planting densities in Peshawar, NWFP-Pakistan during 2000 and 2001. Brown (mature) pods were harvested, threshed and all shriveled and abnormal seeds were removed before determining standard germination and other vigor tests. Standard germination and other vigor tests decreased linearly (R2 = 0.53) from early planting dates to delay planting dates. Similar trend of decrease was observed from low planting density to high planting density. The decrease in AA was curvilinear (R2 = 0.78) and germination reached 15% in May planted crop. Seeds of Williams 82 was more sensitive to high temperature stress than seeds of Epps and seed vigor (AA) were much more sensitive to high temperature stress than was standard germination. Present findings support the results of experiments in controlled environments by demonstrating that high temperature during seed filling in the field, without seed infection with P. longicolla or physical injury, reduced soybean seed germination, vigor and all quality parameters of soybean seed under temperate environment.
  Azza Ebid , Hideto Ueno and Adel Ghoneim
  An incubation study was conducted to assess the effect of composted tea leaves, coffee waste and kitchen garbage on the kinetics of net nitrogen mineralization and P, K, Ca and Mg availability. NH4-N, NO3-N, Bray II P, the exchangeable cations, EC and pH were determined after 0, 7, 14, 21, 42 and 63 day. Inorganic N concentration in the amended soils was analyzed by a first-order model. The pH of the soil increased after 14-21 day of incubation and gradually decreased thereafter. EC values showed the following trend: composted tea leaves > kitchen garbage > coffee waste. The composts were highly variable in their N mineralization characteristics, but the peaks for mineralized N content were observed at early incubation times in all the composts, i.e., after 14-21 day because the composts had undergone maturation. Potential respective mineralizable N (N0) content of the composted tea leaves, coffee waste and kitchen garbage was 18.8, 6.30 and 22.4 mg kg-1 dry soil and the respective rate constant (k) was 0.101, 0.199 and 0.255 day-1. Rate of N mineralization for the composted tea leaves, coffee waste and kitchen garbage was 5.25, 9.10 and 38.6%, respectively, of the total N content. Composted kitchen garbage displayed the highest value for N release rate. P, K and Ca showed the following trend: composted tea leaves > kitchen garbage > coffee waste and Mg was composted tea leaves > coffee waste > kitchen garbage.
  Naomi Asagi , Hideto Ueno and Azza Ebid
  The effects of the application of sewage sludge (SS) on the growth indices, yield and nutrient uptake in rice (Oryza sativa L. cv. Koshihikari) grown in a low fertility soil were investigated and were compared with the effects of the application of chemical fertilizer (CF) and no fertilizer (NF). The application of SS increased plant growth indices in comparison with the NF treatment; however, at harvest, the dry weight of the plants grown in the SS-treated soil was 30% lower than that of plants in the CF-treated soil. The amounts of N uptake by rice from CF, SS and the soil were determined using the A value method. The amounts of N uptake from the fertilizer and soil in the CF treatment were 0.137 and 0.054 g pot-1, respectively and those in the SS treatment were 0.130 and 0.017 g pot-1, respectively. The N use efficiencies of the plants in the CF- and SS-treated soils were 68.3 and 43.0%, respectively. Therefore, the relative efficiency of SS to CF was 62.9%. In comparison to the NF and CF treatments, the application of SS increased the soil microbial activity; this was determined by assaying the fluorescein diacetate esterase activity. At harvest, the pH of the SS-treated soil was higher than that of the soils in the NF and CF treatments and the electrical conductivity (EC) of the CF-treated soil was higher than that of the soils in the NF and SS treatments.
  Adel Ghoneim , Hideto Ueno and Azza Ebid
  Efficient liquid slurry land application requires knowledge of nutrient content, proper application rate and crop needs. An improved understanding of the cycling of biogas slurry N is a prerequisite for making better use of this N source. The efficiency of nitrogen (N) derived from biogas slurry must be determined to optimize use of N and reduce impact on the environment. Keeping in view, a pot experiment was initiated to estimate crop N uptake from biogas slurry and chemical fertilizer that applied to Komatsuna (Brassica campestris L.) using 15N isotope dilution method. In this experiment 180 kg N ha-1 of 1.0 atom % 15N excess ammonium chloride was used. Nitrogen derived from biogas slurry (Ndfs) and recovered-N (Nrfs) in Komatsuna was measured to know the effects of applied slurry on the performance of the crop and nutrient dynamics in a Brown Lowland Soil, Fluvisols west Japan. It was found out that 15N uptake was slightly higher in chemical fertilizer compared to slurry application. In addition, N uptake derived from chemical fertilizer (Ndfc) was better than that taken from soil (Ndfs). Fertilizer use efficiency (FUE-15N) was lower in slurry treatment (47.2%) than chemical fertilizer (65.9%). The relative efficiency (slurry use efficiency/chemical use efficiency *100) was varied in Komatsuna roots and leaves.
  Amir Zaman Khan , H. Khan , R. Khan , Adel Ghoneim and Azza Ebid
  To evaluate the effect of different wheat seed categories with farmer’s seed for yield and yield components. An experiment was conducted at Agriculture Research Farm, NWFP Agricultural University, Peshawar, during 2003-04. The experiment was laid out in Randomized Complete Block (RCB) design with four replications. The seed categories were pre-basic, basic and certified seed of wheat varieties Bakhtawar-92 and Fakhri Sarhad from CCRI, Pirsabak and were compared with farmer’s seed of the same varieties collected from 4 location of the province. Maximum emergence m-2 (183) was recorded from pre-basic seed of Bakhtawar-92 and Fakhri Sarhad collected from CCRI, Pirsabak followed by basic and certified seed category of the same location. Farmer’s seed collected from Peshawar locality gave minimum emergence m-2 (73) among different seed categories. Pre-basic cateroy of Bakhtawar-92 obtained from CCRI, Pirsabak gave maximum spikes m-2 (347.3), grains spike-1 (52.30), biological yield (11500 kg ha-1), grain yield (4931 kg ha-1), thousand grain weight (52.75 g) and harvest index (43.11%), followed by basic and certified categories of the same varieties and location. Among farmer’s seed, Bakhtawar-92 collected from Charsadda and Nowshera locality performed better in all yield parameters as compared to other locations. Farmer’s seed collected from Peshawar and Mardan performed poorly in maximum yield parameters. It is concluded that pre-basic seed of Bakhtawar-92 and Fakhri Sarhad obtained from CCRI, Pirsabak showed better performance in all agronomic parameters and may be recommended for higher production under the agroclimatic conditions of NWFP-Pakistan.
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