International Journal of Agriculture and Biology

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Current impact factor: 0.90

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5-year impact 0.00
Cited half-life 5.40
Immediacy index 0.11
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ISSN 1814-9596

Publications in this journal

  • International Journal of Agriculture and Biology 01/2015; 17:169-174.
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    ABSTRACT: This study investigated the impact of allelopathic crops residue amendments and a nitrification inhibitor DMPP (3, 4-dimethylpyrazole Phosphate) on germination, growth, yield and nitrogen (N) use of wheat. In the first study, wheat cultivars [Lasani 2008 (LS-08) and Faisalabad 2008 (FSD-08)] were grown in soil filled pots (18 kg soil) amended with sorghum and sunflower residues (0, 8 and 12 Mg ha(-1)) in presence and absence of nitrogen fertilizer sources [urea and ammonium sulphate (N at 110 kg ha(-1))]. Plants were raised up to maturity; sorghum residue amendments improved the performance of both wheat cultivars; however sunflower residues initially inhibited wheat germination and stand establishment but at later growth stages, the inhibitory effects were diminished. Both N sources improved grain yield of wheat cultivars with greater by ammonium sulphate in LS-08. Sorghum residue at 12 Mg ha(-1) in addition with ammonium sulphate had significant influence on grain yield of cv. LS-08 than other treatments. In second experiment, cv. LS-08 was grown in soil filled pots amended with sorghum and sunflower residue (16 and 32 Mg ha(-1)) in presence or absence of DMPP (0.36 mu g g(-1)) in greenhouse. DMPP in combination with N in the absence of crop residues improved dry matter production and reduced the C:N ratio; however any residue addition at any rate immobilized N and decreased the dry matter accumulation. In crux, residue amendments in combination with inorganic fertilizers could improve wheat grain yield, while combined use of DMMP and N can improve plant N availability and dry biomass. (C) 2015 Friends Science Publishers
    International Journal of Agriculture and Biology 01/2015; 17(2):261–270.
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    ABSTRACT: Nickel (Ni) is the most eco-toxic and harmful metal for soil biological activity, plant metabolism and health of animals and human beings. Elevated level of Ni in plants causes many nutritional and physiological disorders as well as perturbs normal balance of phytohormones. Exogenous application of phytohormones can regulate plant growth and reduce inhibitory effect of toxic metals on plants. Therefore present study was conducted to assess the effect of Ni contamination on growth and yield of mungbean and role of gibberellic acid (GA3) to counteract negative effects of Ni contamination. Mungbean seeds were sown in potted soil contaminated with different levels of Ni (0, 20, 40, and 60 mg kg-1). Two sets of Ni contamination levels were maintained, one set was kept without application of GA3 while in second set 10-4 M GA3 was applied as foliar spray at 15, 30 and 45 days after germination. Significant reduction in all growth and yield attributes of mungbean was recorded in Ni contaminated pots. However, application of GA3 enhanced the length, fresh and dry weight of shoots and roots as well as grain yield of mungbean in Ni contamination. Moreover, Ni concentration was increased in roots and shoots of mungbean with increasing levels of Ni contamination from 0 to 60 mg kg-1. But, application of GA3 caused significant decrease in Ni concentration in roots and shoots of mungbean in Ni contaminated soil. It is concluded that use of GA3 could be very effective to improve plant growth through reduced Ni uptake by plants in the Ni contaminated soils
    International Journal of Agriculture and Biology 01/2015;
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    ABSTRACT: Greenhouse and field studies were conducted in the spring and autumn of 2010 to test the efficacy of dry amendments of Fumaria parviflora as a form of eco-friendly management of Meloidogyne incognita in tomato. Various preparations of F. parviflora (in the form of dry root, stem, leaf and whole plant powder) at different dose rates (10, 20 and 30 g per kg of soil) significantly reduced levels of M. incognita in the roots of tomato cv. Rio Grande, and promoted plant growth. The root amendments of F. parviflora at the highest application dose (30 g per kg of soil) were the most effective, significantly reducing the number of galls, the galling index, the egg masses per g of the root, and the adult females per g of the root. Shoot and root lengths, the fresh and the dry shoot weight, and the number of branches and flowers per plant were improved in greenhouse trials that were conducted in the spring and autumn. Under naturally infested field conditions, the root´s amendment of F. parviflora at the highest application dose was the most effective, and reduced the number of galls, the GI, the number of egg masses per g-1 of root, the adult females per g of root, and the reproduction factor (Rf). It also promoted plant, health and increased the number of fruits per plant and the fruit weight per plant in the spring and autumn experiment. Dry amendments of F. parviflora have remarkable nematicidal potential and could be used as an effective and environment-friendly management tool against M. incognita as an alternative to chemical control
    International Journal of Agriculture and Biology 01/2015;
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    ABSTRACT: Nitrogen is an essential element required for plant growth and development. However, over-use of nitrogen fertilizer is economically costly and also environmentally damaging. Therefore, identification of genotypes possessing higher nitrogen use efficiency at sub-optimal dose of nitrogen is the key challenge. In this study, effect of nitrogen on the activities of nitrogen assimilatory enzymes, total soluble proteins and amino acids was studied in wheat genotypes of diverse physiology (viz., GLU 1101, GLU 1356, GLU 2001, GLU 700, PH132-4836, PH132- 4840). Nitrogen was applied at recommended dose (RDN), RDN-50%, RDN-25% and RDN+25% using urea as a source. With increase of nitrogen rate, significant increase in the activities of nitrate reductase, nitrite reductase, glutamine synthetase, glutamate synthase and glutamate dehydrogenase was noted, which caused an increase in protein and amino acid contents in all the genotypes. Activity pattern of studied enzymes revealed an increasing trend from tillering to anthesis stage and thereafter declined in parallel with decrease in protein and amino acid contents. Conversely, nitrogen and chlorophyll content showed continuous decrease with leaf development. Genotypes GLU 1356 and GLU 2001 maintained higher activities of nitrogen assimilatory enzymes in parallel with higher nitrogen use efficiency at RDN-50% and RDN-25% while genotypes PH132-4836 and PH132-4840 were found to be at RDN+25%. A positive correlation of nitrogen assimilatory enzymes (nitrate reductase and glutamine synthetase) with nitrogen use efficiency and nitrogen content was also observed indicating that these might be the rate limiting enzymes in nitrogen metabolism. In crux, 25% less than the recommended dose of nitrogen has significant influence on nitrogen metabolism especially in GLU 1356 and GLU 2001 due to high activities of nitrate reductase and glutamine synthetase. These nitrogen efficient genotypes may be exploited in enhancing wheat crop productivity under lower dose of nitrogen to save environment and input cost.
    International Journal of Agriculture and Biology 01/2015;
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    ABSTRACT: Deficit irrigation (DI) is an optimization strategy that allows water stress to some extent during certain cropping stages or for the whole season without a significant reduction in yield. A greenhouse experiment was conducted during the growing seasons of 2009/2010 and 2010/2011 to study the effect of water quality and DI on growth, yield and water use efficiency (WUE) of tomato at different growth stages. Two different water qualities (saline and non-saline water with electrical conductivities (EC) 3.6 and 0.9 dSm-1, respectively) nine DI treatments and three irrigation treatments (100, 75 and 50% of Etc) were investigated in the experiment. Furthermore, DI at 75% and 50% of ETc during vegetative, reproductive, and fruiting stage were adopted. The result indicated that in general the irrigation with saline water decreased tomato fruits yield and WUE. Moreover, the negative effect of DI was more obvious when coupled with salt stress. Irrigation with saline water resulted in 22% and 24% reduction in yield during first and second season, respectively. Fruiting and vegetative growth stages were the most tolerant to DI; whereas, the reproductive stage was the most sensitive one. The crop response factor (Ky) values ranged between 0.24 and 0.75. Irrigation with non-saline water at 75% ETc at fruiting or vegetative growth stage did not significantly decrease the growth and fruit yield but enhanced WUE, increased vitamin C and total soluble solids (TSS) content and saved 10% of irrigation water. Therefore, this treatment can be recommended as an irrigation management strategy for tomato production under greenhouse conditions. By using this strategy, approximately 21% of irrigation water can be conserved without reduction in yield.
    International Journal of Agriculture and Biology 01/2015; 17(2):241-250.