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Articles by M. A. Khan
Total Records ( 11 ) for M. A. Khan
  R. H. Rahman , N. Nowsheen , M. A. Khan and A.H. Khan
  Finding the location of a mobile phone is one of the crucial challenges in modern telecommunication system. This study proposes a solution of locating a mobile phone on a city map using SMS (Short Message Service). This study intends to help mobile phone users to find out his/her location on a geographical map. The proposed method is GPS-free and it requires no additional technology to be added to existing mobile phones. It uses well-established algorithms to locate a mobile phone on a geographical map and then sends the position-on-a-map to the user mobile by an SMS.
  S. M. Alam and M. A. Khan
  The spray application of NAA at variable concentration significantly increased the fruit yield of tomato, when compared to control. The nutrient contents were also increased in majority of cases.
  M. Tariq , M. A. Khan and S. Perveen
  A field experiment was conducted to study the response of maize to varying levels of applied zinc. Zinc was applied @ 0, 5, 10, 15 and 20 kg ha -1 along with 120 N, 90 P2O5 and 60 K2O kg ha -1. Results indicated that the yield and yield components were significantly increased with applied zinc over control (with out fertilizer) and NPK alone treated plots. Zinc concentration in soils, in leaves and total uptake by maize also significantly increased with applied zinc, indicated zinc was deficient in the test soil. Therefore, zinc fertilization is necessary for maize crop under prevailing conditions. Moreover, the extraction capacity of AB-DTPA > DTPA for soil zinc and showed close correlation with plant zinc, suggested former method is suitable for extracting available zinc in calcareous soils.
  S. M. Alam , R. Ansari , S. M. Mujtaba , M. A. Khan and Saboohi Raza
  Nutrient depletion in the farm land areas has brought terrible devastation in some cropping areas of a country. There is no vegetation whatever, despite adequate rainfall and chemical fertilizers are now re-vegetating such areas. They have rapidly overtaken organic matter as a chief source of nutrients and expert opinion believes that such external nutrients source are the only way to sustain the food requirement of the population. If sustainability is to be maintained as the first priority, then other important components such as efficiency of input use, economic return and environmental protection can all be used appropriately as part of the sustainability phenomenon.
  S.M. Alam , M. A. Khan , M. Ali and R. Ansari
  Water culture experiment was conducted to observe the effects of different levels of Zn and P alone and in combination on the growth ,chlorophyll and peroxidase contents of rice (cv. Shadab).The concentrations for the study were Zn: 0.0, 5.0, 10.0, and 20.0 mg L-11, and P 0.0, 20.0, 40.0, 60.0 mg L -1. It was observed that the growth of fresh and dry weights of shoot, root and its length were increased in more or less all the treatments as compared to control. Contrary to this the chlorophyll and peroxidase contents were substantially decreased with increasing levels of Zn and P. It was observed that intermediate levels of both Zn and P were seemed to be beneficial for the growth of rice.
  S. Haidar and M. A. Khan
  Path coefficient analysis was done to understand the type of contribution directly as well as indirectly of each character to yield of seed cotton. The results revealed that number of bolls per plant and boll weight had the maximum direct effect on yield of seed cotton per plant. Number of bolls per plant had negative indirect effect on boll weight, while boll weight had positive indirect effect on ginning outturn percentage and negative indirect effect on number of bolls per plant and number of seeds per boll. Number of seeds per boll had negative direct effect on yield of seed cotton per plant while ginning outturn percentage had very small positive effect on yield of seed cotton per plant. So it is suggested that selection for higher productivity should be based on higher number of bolls per plant and boll weight.
  M. A. Khan , Mushabar Zahoor , I. Ahmad , G. Hassan and M. S. Baloch
  The relative efficacy of hand weeding and six herbicides on the yield components and yield of wheat variety Inqalab 91 was studied. Hand weeding and herbicides significantly increased the number of fertile tillers, spike length, number of Spikelets per spike, number of grains per spike, 1000-grain weight, biological yield and grain yield. The herbicides application decreased the weed population. The grain yield corresponded with the weed mortality of the different treatments Buctril-M, Tolkan and Logran produced the highest grain yield and comparable with the hand weeding. Buctril-M was in turn statistically at par with all other herbicidal treatments but it out yielded the weedy check. All other herbicides could not produced higher yield from the weedy check, statistically. It is recommended from the data that Buctril-M is a herbicide of choice for controlling broad leaf weeds spectrum of D.I.Khan area.
  M. Azhar , M. Iqbal , M. A. Khan and M. Ashraf
  A combination of physical and chemical methods can accelerate the reclamation process. This study was undertaken to investigate the effect of tillage implements in combination with the chemical amendments on the reclamation of saline-sodic soils. Subsoiler, chisel plough, disk plough and narrow-tine cultivator were employed. Subsoiler is found to be the most effective tillage implement for the reclamation of saline soils. Wheat emergence was maximum in sub-soiled plots followed by chisel plough, disk plough and cultivator. ECe decreased from 29.60 to 4.75 dS m-1 (85%), pH 8.1 to 7.43 (8.27%), ESP 115 to 18 (84.34%), and SAR 92.21 to 13.92 (84.90%). The trend of ECe, pH, ESP and SAR was almost reversed after the treatments. The reclamation rate was greater with 75% gypsum applications than that of 50%.
  M. A. Khan , R. Makhdoom , T. Husnain , M. Z. Saleem , K. Malik , Z. Latif , I. Altosaar and S. Riazuddin
  The possibility of using a monocot (maize) derived ubiquitin (Ubi) promoter to express a fully modified insecticidal cry gene of Bacillus thuringiensis in dicot plant, tobacco was studied. Tobacco (Nicotiana tabacum cv. xanthi) plants were transformed with Bt gene Cry-1Ac driven by Ubi promoter. Transgenic plants were confirmed for transformation, gene expression and insecticidal activity through PCR, GUS assays, Southern blot, Western blot analyses and insect bioassays. Bioassays with cry-1Ac transformed To and T1 transgenic plants showed high level of toxicity towards American bollworm (Heliothis armigera) giving 100% mortality of the larvae. This paper reported that monocot derived Ubi promoter expresses a Bt gene in a dicot plant in an effective manner to render the transformed plants highly resistant against Heliothis armigera.
  M. S. Khan , M. Younas and M. A. Khan
  Heritabilities of and correlations between yearling weight and post-weaning growth rate in Bhagnari and its crosses with Australian Droughtmaster cattle in Balochistan were estimated. Out of 1118 weaning weight observations with sire identification, only 136 had yearling weight recorded on them. The overall mean for the yearling weight was 151.5±38.9 kg while post-weaning growth rate averaged 261±56 gm. Heritability of the traits estimated by paternal half-sib correlation was 0.19±0.24 and 0.03±0.20, respectively. Very large standard errors reflected the scarcity of data points. Both the traits were highly positively correlated (0.72) due to the fact that the growth rate was derived from the yearling weight. The environmental correlation had a similar magnitude (0.67) but genetic correlation was unrealistic.
  B. C. Halder , M. S. Rahman , M. A. Khan , M. R. Amin and M. A. Kabir
  The performance of stem cutting with IBA in different ornamental plants was investigated. The ornamental plants under study showed significant variation in respect of all the parameters, viz. number of leaves and roots per cutting, fresh and dry weight of leaves and shoots, length of roots per cutting, fresh and dry weight of roots per cutting, number of shoots per cutting after 15, 25, 35, 45 and 55 days. Ixora (Ixora chinensis) performed the best in respect of highest number (40.10) of leaves per cutting, longest roots (5.15cm) and fresh and dry weight of roots per cutting (1.35 fresh weight and 0.29gm dry weight). Both fresh and dry weight of leaves and shoots per cutting were highest in Poinsettia (Poinsettia pulcherima). Poinsettia also produced highest number (46.97) of roots per cutting. Mussaenda (Mussaenda erythroplylla) and Night Jasmine (Nyctanthes arbortristis) failed to produce any root.
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