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Search Results: 1 - 10 of 18468 matches for " Amjed Ali "
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Differential Growth and Development Response of Sunflower Hybrid in Contrasting Irrigation Regimes  [PDF]
Amjed Ali, Ijaz Rasool Noorka
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.45131
Abstract:

Water is the most important factor limiting crop productivity at different growth stages of crop growth and development. The study was conducted to investigate the effect of irrigation scheduling on sunflower hybrid (Hysun-38) at vegetative versus reproductive stages during spring season 2010. The trial was laid out in randomized complete block design (factorial arrangement), replicated thrice, having net plot size of 3.5 m × 9 m. The treatments comprised of irrigation application of 75 mm each, at different growth and development stages. viz., I1 = irrigation at plant establishment, I2 = irrigation at plant establishment and irrigation at vegetative phase, I3 = irrigation at plant establishment, irrigation at button stage and irrigation at flowering, and I4 = irrigation at plant establishment, irrigation at vegetative phase, irrigation at button stage and irrigation at achene’s formation. Days taken to 50% flowering was highest in I2, where irrigation was applied at plant establishment and vegetative phase, and in I4 treatment , where irrigation was given at seedling establishment, irrigation at vegetative phase, irrigation at button stage and irrigation at achene’s formation. Leaf area index at different growth intervals was significantly affected by irrigation levels. Crop growth rate was highest for treatment I4. Plant

Effect of nitrogen on achene protein, oil, fatty acid profile, and yield of sunflower hybrids Efecto de nitrógeno en la proteína, aceite, y perfil de ácidos grasos del aquenio y rendimiento de híbridos de girasol
Amjed Ali,Sami Ullah
Chilean Journal of Agricultural Research , 2012,
Abstract: Seed yield and achene oil yield are the main determinants for N application rates rather than seed composition. Nitrogen plays a critical role in producing unsaturated fatty acids (oleic and linoleic acids), which are the main factors determining sunflower oil quality (Helianthus annuus L.). Studies were conducted on the effect of N fertilization on seed yield, achene oil yield, and quality parameters of sunflower hybrids for two successive years (2010 and 2011) in a split plot arrangement under a randomized complete block design. The hybrids (Hysun-33 & S-278) and N levels (0, 75, 150, and 225 kg ha-1) were allotted in main and sub-plots, respectively. Increasing N levels resulted in steady increases in yield, protein contents and linoleic acid, whereas oil contents and percentage of oleic acid responded negatively during both years. At the same time, crop oil yield was positively related to increased N supply with higher achene yield (AY). Palmitic acid varied from 5.27 to 6.42 % and stearic acid ranged from 2.27 to 2.95%. Hybrid S-278 exhibited significantly (P < 0.05) higher AY (3380 kg ha-1), oil content (42.11%) than Hysun-33 (2968 kg ha-1 and 40.75%, respectively), while the opposite was true for protein content. Oil yield varied in response to N fertilizer, with a range of 34 to 37% providing the best quality traits in both seasons. Parece racional que el rendimiento de semilla y rendimiento de aceite de aquenio sigan siendo el foco determinante para tasas de aplicación de N en lugar de la composición de la semilla. El N parece jugar un papel imprescindible en la proporción de ácidos grasos insaturados (ácidos oleico y linoleico), factor principal que determina el aceite de girasol (Helianthus annuus L.). Los estudios fueron realizados para evaluar el efecto de la fertilización N en el rendimiento de semilla, rendimiento de aceite de aquenio, y parámetros de calidad de híbridos de girasol por 2 anos sucesivos (2010 y 2011) en un diseno de bloques completos al azar con arreglo de parcelas divididas. Los híbridos (Hysun-33 y S-278) y niveles de N (0, 75, 150 y 225 kg ha-1) fueron asignados a parcelas principales y sub parcelas, respectivamente. Niveles crecientes de N aumentaron de manera estable el rendimiento, contenidos de proteína y de ácido linoleico en el aceite, donde contenidos de aceite y porcentaje de ácido oleico respondieron negativamente durante ambos anos. Al mismo tiempo, el rendimiento de aceite del cultivo permaneció positivamente relacionado al gran suministro de N dando la ventaja de mayor rendimiento de aquenio (AY). El ácido p
Nitrogen and phosphorus management strategy for better growth and yield of sunflower (Helianthus annuus L.) hybrid
Amjed Ali and Ijaz Rasool Noorka
Soil & Environment , 2013,
Abstract: This study conducted during autumn season, 2010 investigated the effect of nitrogen and phosphorus on sunflower hybrid Hysun-33. The experiment was planned in randomized complete block design (factorial arrangement), with three replication, having net plot size of 3 x 7 m. The experiment comprised of 9 treatments, three levels of nitrogen and phosphorus, viz., 85, 135, 185 kg N ha-1, and 50, 75, 85 kg P ha-1. Nitrogen affected all estimated characters significantly, except plant population, while, phosphorus did not show significant effect on plant population and plant height. All other parameters, as leaf area plant-1, head diameter, 1000- achene weight and achene yield were affected significantly by different nitrogen and phosphorus levels. Interactive effects of nitrogen and phosphorus were significant in all these cases. The highest achene’s yield (2584 kg ha-1) was obtained with the application of 135-75 kg NP ha-1as against the lowest (1491kg ha-1) at 85-50 kg NP ha-1.
Water Stress Tolerance, Its Relationship to Stem Reserve Mobilization and Potence Ratio in Spring Wheat  [PDF]
Ijaz Rasool Noorka, Amarah Batool, Sultan AlSultan, Saba Tabasum, Amjed Ali
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.42030
Abstract: Twelve wheat (Triticum aestivum L.) cultivars and their sixteen direct and reciprocal crosses were evaluated for heterosis, heterobeltiosis and potence ratio to determine the potential of wheat genotypes under contrasting water regimes. The highest positive heterosis and heterobeltiosis was observed in cross combination Sehr-06 × Pasban-90 under both water regimes for the trait stem reserve mobilization (SRM). While in trait 1000-grain weight the cross-combination Pari-73 × C-273 (Normal irrigation) and Fsd-08 × SA-42 (water stress) showed highest heterosis and Pari-73 × C-273(Normal irrigation) and Fsd-08 × Chenab-70(water stress) showed highest value of heterobeltiosis. The potence ratio in both traits expressed overdominance estimates exhibiting the presence of transgressive segregants, may be exploited for on-ward selection in the bread wheat improvement. The genotypes showing better SRM based 1000-grain weight in the absence of photosynthesis indicates relative water stress tolerance. This procedure paved an indirect way to screen the wheat genotypes to withhold water stress situation and sustain wheat production.
Chemical Control of Monocot Weeds in Wheat (Triticum aestivum L.)  [PDF]
Zia Mehmood, Muhammad Ashiq, Ijaz Rasool Noorka, Amjed Ali, Saba Tabasum, Muhammad Shahid Iqbal
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.59140
Abstract:

Due to similar growth pattern and morphology, monocot weeds offer more severe competition with wheat. A field experiment was conducted to screen herbicides most suitable for the control of monocot weeds in wheat. Seven herbicides viz., Puma super 69EW @ 862.5 g a.i. ha-1, Bristle 69 EW @ 1250 ml, Topik 15WP @ 37.05 g a.i. ha-1, Safener15WP @ 247g, Certain 80WD @ 395.2 g and Tremor 24EC @ 247 ml/ha were used. Weedy check where no weed control was practiced was kept as control. All herbicides were sprayed as post-emergence with second irrigation 38 days after crop sowing. The best weed control was accomplished by Safener 15WP 247 g ha-1 as significantly lower weed counts per m2 (11.0) and higher percent weed control (73.4%) were noted after 21 days of its spray. Wheat growth parameters like plant height, number of tillers per m2, spike length and number of spikelets per spike remained statistically at par among various treatments. Significantly higher number of grains per spike (55.67) and 1000 grain weight (36 g) were noted with Puma Super 69EW @ 1250 ml ha-1 and Certain 80WD 395.2 g ha-1, respectively. Although treatments did not differ significantly with respect to wheat grain and biological yields, yet the highest grain yield (3708.3 kg ha-1) and biological yield (10208.3 kg ha-1

Effect of Growth Stage-Based Irrigation Schedules on Biomass Accumulation and Resource Use Efficiency of Wheat Cultivars  [PDF]
Muhammad Mubeen, Ashfaq Ahmad, Tasneem Khaliq, Syeda Refat Sultana, Shahid Hussain, Amjed Ali, Hakoomat Ali, Wajid Nasim
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.47175
Abstract:

Climate and weather conditions greatly affect the performance of new wheat cultivars for yield and resource use efficiency. In order to know the effect of irrigation schedules based on growth stage (the most vital criterion in the region) on growth, yield and radiation use efficiency of wheat cultivars in Faisalabad conditions, a study was planned at Agronomic Research Area, University of Agriculture, Faisalabad during 2009-2010. Split plot design with irrigation levels in main plots and cultivars in sub-plots was implied. Irrigation levels were: IT = irrigation at tillering stage, ITS = irrigation at tillering and stem elongation stage, ISB = irrigation at stem elongation and booting stage and ITSBG = irrigation at tillering, stem elongation, booting and grain filling stage. Cultivars selected were: Faisalabad-2008, Lasani-2008, Miraj-2008, Shafaq-2006 and Chakwal-97. Irrigation treatment ITSBG gave higher grain yield (4.23 t·ha-1) followed by ISB (3.60 t·ha-1), however ITSBG was statistically similar to ISB in radiation use efficiency (RUE) for grain yield (RUEGY). Similarly the two treatments were statistically at par in maximum leaf area index, total dry matter (TDM) accumulation, cumulative photosynthetically active radiation (PAR), and RUETDM. Hence where less numbers of irrigations are available, irrigation at stem elongation and booting stage is suitable for achieving economic yield. Lasani-2008 produced maximum grain yield (4.37 t·ha-

OILCROP-SUN Model for Nitrogen Management of Diverse Sunflower (Helianthus annus L.) Hybrids Production under Agro-Climatic Conditions of Sargodha, Pakistan  [PDF]
Muhammad Irfan Ahmad, Amjed Ali, Aaqil Khan, Sikandar Ali Jamro, Alam Sher, Shafeeq-ur Rahman, Arif Rashid
American Journal of Plant Sciences (AJPS) , 2017, DOI: 10.4236/ajps.2017.83028
Abstract: Decision support system for agro-technology transfer (DSSAT), OIL CROP-SUN Model was used to stimulate the phenology, growth, yield of different two sunflower hybrids. i.e. Hysun-33 and S-78 by applying different nitrogen levels. The effect of nitrogen (N) on growth and yield components of different sunflower (Helianthus annuus L.) hybrids were evaluated under agro-climatic conditions of Sargodha, Pakistan during spring 2013. The experiment was laid out in a randomized complete block design with split plot arrangement having three replications, keeping cultivars in the main plots and nitrogen levels (0, 45, 90,135 and 180 kg/ha) in sub plots. OIL CROP-SUN Model showed that the model was able to simulate the growth and yield of sunflower with an average of 10.44 error% between observed and simulate achene yield (AY). The result of simulation indicates that nitrogen rate of 180 kg/ha produced highest achene yield in S-78 hybrid as compared to other treatments and Hysun-33 cultivar.
Nitrogen Management of Diverse Sunflower (Helianthus annus L.) Hybrids Production under Agro-Climatic Conditions of Sargodha, Pakistan  [PDF]
Muhammad Irfan Ahmad, Amjed Ali, Aaqil Khan, Alam Sher, Arif Rashid, Sikandar Ali Jamro, Shafeeq ur-Rahman, Saboor Ahmad
American Journal of Plant Sciences (AJPS) , 2017, DOI: 10.4236/ajps.2017.86092
Abstract: A field study was carried out with the objective to determine the effect of various levels of nitrogen on growth, development, yield and yield components of different sunflower (Helianthus annuus L.) hybrids i.e. Hysun-33 and S-78 were evaluated under agro-climatic conditions of Sargodha, Pakistan during spring 2013. The experiment was laid out in a randomized complete block design with split plot arrangement having three replications, keeping cultivars in the main plots and N levels in the subplots. The net plot size was 4.2 m × 6 m. The growth parameters such are leaf area, leaf area duration and yield parameters were observed are Days to a thesis, Days to maturity, head diameter (cm), No. of achene’s per head, Achene yield (kg·ha-
OILCROP-SUN Model Relevance for Evaluation of Nitrogen Management of Sunflower Hybrids in Sargodha, Punjab  [PDF]
Ashfaq Ahmad, Amjed Ali, Tasneem Khaliq, Syed Aftab Wajid, Zafar Iqbal, Muhammad Ibrahim, Hafiz Muhammad Rashad Javeed, Gerrit Hoogenboom
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.49212
Abstract:

The experiments were conducted to evaluate the performance of crop system (DSSAT) OILCROP-SUN model simulating growth & development and achene yield of sunflower hybrids in response to nitrogen under irrigated conditions in semi arid environment, Sargodha, Punjab. The model was evaluated with observed data collected in trials which were conducted during spring season in 2010 and 2011 in Sargodha, Punjab, Pakistan. Split plot design was used in layout of experiment with three replications. The hybrids (Hysun-33 & S-278) and N levels (0, 75, 150 and 225 kg.ha-1) were allotted in main and sub plots, respectively. The OILCROP-SUN model showed that the model was able to simulate growth and yield of sunflower with an average of 10.44 error% between observed and simulated achene yield (AY). The results of simulation analysis indicated that nitrogen rate of 150 kg.N.ha-1 (N3) produced the highest yield as compared to other treatments. Furthermore, the economic analysis through mean Gini Dominance also showed the dominance of this treatment compared to other treatment combinations. Thus management strategy consisting

Growth and Economic Assessment of Wheat under Tillage and Nitrogen Levels in Rice-Wheat System  [PDF]
Rafi Qamar, Ehsanullah  , Abdul Rehman, Amjed Ali, Abdul Ghaffar, Athar Mahmood, Hafiz Muhammad Rashad Javeed, Mudassir Aziz
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.411260
Abstract:

Mechanically post-harvest puddled rice field has stubbles that often delay timely planting of winter wheat crop. Zero tillage increased the net return by decreasing the unwise tillage operations and labor charges. Keep in view, a randomized complete block design experiment in a split plot arrangement was conducted with four tillage system [conventional tillage, CT; deep tillage, DT; zero tillage with zone disc tiller, ZDT; and happy seeder, HS] in main plots and five nitrogen levels [0, 75, 100, 125, and 150 kg·ha-1] in subplots during 2009 to 2010 and 2010 to 2011 cropping seasons. Results showed that in 2009-10 and 2010-11 grain yield (4.6 Mg·ha-1 and 5.7 Mg·ha-1) in DT and (4.5 Mg·ha-1 and 5.8 Mg·ha-1) in HS were significantly higher compared with CT and ZDT. Significantly, maximum leaf area index (5.18 and 5.24) and crop growth rate (12.14 g·m-2·d-1 and 13.15 g

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