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Articles by Saeed Ahmad
Total Records ( 11 ) for Saeed Ahmad
  Mahmood-ul-Hassan , Taj Muhammad , Saeed Ahmad , Muhammad Iqbal , Abdul Karim and Muhammad Yousaf Akhtar
  To explore N- use efficiency of MNH554 a tetraploid cotton (Gossvpium hirsutum L.) in relation to various irrigation regimes, a three year project was launched in 1998 under agro-ecological conditions prevailing at Multan. The experiment was seeded in the open field during the normal growing season, with pure and true to type seed of variety MNH554. Four nitrogen doses and three irrigations regimes were applied to the crop. In addition, the crop had also received 56 kg P ha-1 and 55 kg K ha-1 as a basal dose. Growth and development characteristics comprising of height of the plant, number of mature bolls per plant, boll weight, yield of seed cotton and ginning outturn were studied. Plant height, bolls per plant, boll weight and yield of seed cotton registered a positive and significant response to increasing doses of nitrogen and irrigation. On an average of three years, the maximum yield of 4105 kg ha-1 of seed cotton was obtained by 168 kg N ha-1 with seven irrigations, well distributed throughout the growth and development period. Nitrogen and irrigation application did not improve the ginning outturn, rather it ensued a slight drop.
  Saeed Ahmad , Taj Muhammad , Abdul Karim , Abdul Jabbar and Ghayour Ahmad
  Four varieties of onion viz; Phulkara Dark Red, Desi and Rubina were evaluated to see the effect of pollinator and insecticides on seed setting. Reduced or limited visiting of pollinators caused substantial reduction in seed production of onion showing 50 to 61% seed setting with non significant difference among the varieties. However significant differences were observed among varieties for number of flowers per umbel, number of fertilized flowers per umbel, umbel weight and seed weight per umbel. This reduction in seed production could be due to pesticides application of side grown crops (sunflower, brassica and coriander etc.).
  Ghayour Ahmad , Saeed Ahmad Malik , Zahid Mamood , Muhammad Zaffar Iqbal , Saghir Ahmad and Saeed Ahmad
  Three local as well as exotic leaf curl virus susceptible lines/cultivars of cotton, i.e., S-12, Acala-1517-C and CIM-70 were evaluated for yield, yield components and fibre traits. This disease had adverse effect on morphological, yield and yield components and fibre quality of all varieties. The cv. CIM-70 exhibited the highest reduction (87.3 %) in seed cotton yield and staple length (7.1 %) due to cotton leaf curl virus disease. The extent of adverse effects of this disease was most prominent on ginning out-turn (-18.2 %) and fibre fineness (23.8 %) of S-12.
  Fayyaz Ahmad , Ishfaq Ahmad Hafiz , Ali Asghar Asi , Saeed Ahmad and Mehmood Khan
  These studies were carried out in six mango cultivars to assess the intensity of malformation and evaluate the control measure of the malady through removal of the infected shoots during 1999-2000 and 2000-2001. The malformation was found highest in cv., Anwar Retaul (56.63%). Mango cvs., Chaunsa and Malda borne medium percentage of malformation i.e., 44.05 and 43.05%, respectively. The intensity was moderately low in Dusehri and Langra with values of 36.73 and 34.48%. The malformation susceptibility was found lowest in Sensation (16.51%). The removal of the malformed shoots at pea size stage of fruit development, resulted in reduction of the malady on an average of 60.79% in the subsequent year. However, the response of different varieties to removal of affected shoots for the control of the disease was variable.
  Hafiz Riaz Ali Shah Ghulam Abbas Chatta , Ishfaq Ahmad Hafiz , Saeed Ahmad and Mahmood Khan
  The research work to investigate nitrogen concentration in leaf blades and petiole of bearing mango trees were carried out during 1996-97, 1997-98. Further more, effect of nitrogen and calcium carbide on quality of mango fruit were also studied. In fertilized trees, concentration of nitrogen remained significantly higher in leaf blades than those of the unfertilized trees. The same behavior came into evidence in case of nitrogen concentration in leaf petiole. Higher concentration of nitrogen was found in April, which decreased during March, October and September gradually. Fruit obtained from fertilized trees showed higher total soluble solids and low acidity as compared to control. Influence of calcium carbide (CaC2) on fruit quality was found better interms of total soluble solids, organoleptic quality, acidity and intensity of wrinkling.
  Saeed Ahmad , Abdul Karim , Abdul Jabbar , Mahmood-ul-Hassan , Taj Muhammad and Muhammad Iqbal
  A wide range of average performance and genetic variability was estimated for F1 crosses of nine commercial varieties of cotton viz., CIM443, MNH147, FH-682, N. Krishma, SLS-1, CIM-446, CIM448, FVH-53 and MNH552 for bolls and seed cotton yield per plant, boll weight, staple length, ginning out turn (%) and virus infestation (%). The highest genotypic variability was recorded for virus infestation (94.61%) followed by bolls per plant (29.84%). The highest estimates of heritability associated with highest genetic advance for bolls per plant (97.8 and 60.78), virus infestation % (95.0 and 189.9) and boll weight (97.39 and 10.99) suggested selection for improvement of these traits due to presence of sufficient genotypic variability. However, low estimates of these parameters for staple length showed slow progress through selection.
  Saeed Ahmad , Taj Muhammad , Abdul Karim , Abdul Jabbar and Ghayour Ahmad
  Four varieties of Onion viz., Phulkara, Dark Red, Desi and Rubina were evaluated to see the effect of pollinator on seed setting. Reduced or limited visiting of pollinators caused substantial reduction in seed production of onion showing 50 to 61% seed setting with non significant differences among the varieties. However, significant differences were observed among varieties for number of flowers, fertilized flowers, seed weight per umbel and umbel weight. This reduction in seed production could be due to pesticides application or attraction of side grown crops (Sunflower, Brassica and Coriander etc.)
  Saghir Ahmad , Muhammad Zaffar Iqbal , Saeed Ahmad , Muhammad Attique Sadiq and Noor-ul-Islam Khan
  Inheritance pattern of sympodia per plant, plant height, bolls per plant, seed cotton yield and seed oil content of cotton was assessed using diallel crossing model in which six genotypes B-557, Culture 728-4, MNH156, B-1850 (ne), Culture-604-4 and MNH147 were crossed in all possible combinations. The results from scaling tests for the adequacy of additive-dominance model indicated that sympodia per plant, plant height, bolls per plant, seed cotton yield and seed oil content were partially adequate for further genetic analysis. Sympodia per plant, plant height, bolls per plant and seed cotton yield and were controlled by additive genes, whereas over-dominance was prevalent in seed oil content characteristics. Narrow sense heritability for plant height, bolls per plant and seed cotton yield suggested that these parameters could effectively be improved through selection in the early segregating generations.
  Muhammad Naeem , Hakoomat Ali and Saeed Ahmad
  Weed count, weed fresh weight per meter square of mungbean were found to be significantly different in various weed control treatments. However, maximum values of these parameters were obtained in weedy check and minimum in hand weeding treatments. Almost all herbicides at either dose or method of application produced similar results.
  Muhammad Naeem and Saeed Ahmad
  Although plant height was the maximum in weed-free plots, but differences were non-significant among plots having competition up to 30 days after emergence of mungbean. Weed competition with mungbean beyond 30 days after emergence was critical and resulted in considerable reduction in pod length. Maximum biological yield was produced in plots maintained weed-free throughout the growing season. Minimum biological yield was recorded from plots where weed competition prolonged up to 50 days after crop emergence and also up to harvesting of mungbean. Weed competition with mungbean persisting for 20-30 days after crop emergence was very critical and prolonged competition resulted in substantial yield reduction.
  Altaf Hussain Tariq , Saeed Ahmad , Muhammad Arshad Hussain , Lal Hussain Akhtar , Muhammad Arshad and Sabir Zameer Siddiqi
  38 isogenic lines were studied for the presence of wheat leaf rust virulence during the years 1997-98 to 2001-2002 at Regional Agricultural Research Institute, Bahawalpur. Lr9, Lr19, Lr24, Lr25 and Lr36 were free of reaction whereas Lr3ka, Lr12, Lr13 and Lr17 exhibited resistant reaction. 18 lines (Lr1, Lr2a, Lr2c, Lr3, L3bg, Lr8, Lr10, Lr11, Lr14a, Lr14b, Lr16, Lr20, Lr21, Lr22b, Lr23, Lr26, Lr29 and Lr30) gave high population of virulence and exhibited 20S-100S reaction through out the study period. Lr18 and Lr34 gave improvement in reaction, which may be due to decline in their corresponding virulence. Lr34 is an adult plant resistant gene and can be exploited in combination with other genes. The high frequency of leaf rust virulence for Lr26 was recorded consistently during 4 year because the wheat varieties carrying Lr26 gene remained in the field covering vast area throughout the world. This gene in combination with other genes is effective against prevailing leaf rust pathogens in most of the cultivars in Pakistan.
 
 
 
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