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Articles by N. Ahmad
Total Records ( 10 ) for N. Ahmad
  M. Sarwar , N. Ahmad , Q.H. Siddiqui , A.A. Rajput and M. Toufiq
  Field studies were carried out to evaluate the effects of different insecticides as foliar application for the control of aphids population on canola (Brassica napus L.) crop. The insecticides Endosulfan (Thiodan 35EC), Fenpropathrin (Sanitol 20EC) and Dimethoate (Systoate 40EC) were sprayed with knapsack sprayer at the normal recommended doses and a check plot was also maintained for comparison. The efficacy of these insecticides was assessed by counting the aphids mortality and their influences on grain yield on treated plots. Studies revealed that all the tested insecticides were superior and most promising for aphids management and provided better crop yield as compared to untreated plot (140 aphids per plant and 1707 g yield per 8m2). Endosulfan was proved highly toxic to control aphids population (4.66 aphids plant-1) and maximum yield was obtained (2322.0 g/8m2) followed by Fenpropathrin and Dimethoate (6.83, 13.17 aphids plant-1 and 2107.0, 1948.0 g/8m2 grain yield, respectively).
  A. Waheed , F. S. Hasid , N. Ahmad and B. Mand Khan
  Study on the economic feasibility of tea in Pakistan was illustrated from the start till to date. The flourishing of the tea industry in Pakistan in its present form, many attempts have been made so far on Government level and in private sector as well from the last 50 years. The serious efforts began in the late 80`s. With the Governmental encouragement tea was started to its blooming and the replacement of other crops in the area were made accordingly. Recently new and more extensive plantations are being built-up, under the auspices of PARC/NTRI in the Northern part of Pakistan. In the study an over view of all efforts are being shown for its development along with its stages being faced. The successful growth of tea plants in the area have been ascertained, the yield potential and quality of made-tea have been assessed to be economically viable, the extent of suitable area has been identified and finally, the production package for growers has been evolved.
  M. Z. Hosain , N. Ahmad , S. K. Saha , S. Majumder , M. A. Miah and M. A. Halim
  A total of 25. one month old Long Evan male rats were studied to observe the effects of different edible oils on hemato-biochemical profiles. They were randomly assigned to one of five equal groups (n= 5) as A, B, C, D and E. Group. A was considered as control fed with rat feed (ICDDR`B) and others were supplemented with soybean oil (Group B), palm oil (Group C), coconut oil (Group D) and mustard oil (Group E) at a concentration of 7.5% with rat feed for 8 weeks. TEC was increased significantly (P<0.05) in group D as compared to control. The Hb concentration increased significantly (P<0.05) in group B and highly significantly (P<0.01) in group C and E. The PCV increased significantly (P<0.05) in group C as compared to control. ESR differed insignificantly (P>0.05) among treatment groups compared to control. TLC differed insignificantly (P>0.05) in group B,C,D but varied significantly (P<0.05) in group E to that of control. The total serum cholesterol differed insignificantly (P>0.05) in the treatment groups. Triglycerides concentration of group E differed significantly (P<0.05) but insignificantly in group B,C and D to that of control. There was no significant (P>0.05) difference of HDL-cholesterol in treatment groups with the control. The LDL- cholesterol values were below detection level in all rats. The results suggest that edible oils have little effect in rat haematobiochemical parameters. Further research should be carried with long duration before making any comments.
  S. Hamdan , M.Z. Abdul Rahman , D.M.A. Hashim and N. Ahmad
  Blends consisting of a systematic compositional series of Sago Starch (SS) and chitosan (CS) were studied by using a Brookfield Digital Viscometer Model DV-II Version 2.0. The viscosity of pure SS, pure CS and SS/CS blends was measured over the temperature range 30-130 °C. Results on the SS/CS blends indicate that the viscosity decreases with temperature and SS content for a fixed speed. At lower SS content, the decrease of viscosity with temperature is more pronounced. This indicates that blends with higher CS content are more affected by temperature changes. Blend containing 50%CS was superior compared to other blends and this finding is consistent with earlier works on compatibility studies of polypropylene/sago starch blend using Dynamical Mechanical Thermal Analyzer (DMTA).
  A. Waheed , A. Jamal , F.S.Hamid and N. Ahmad
  In this very experiment to find out the effect of NPK & Urea with different levels (4 & 8 2.gm/sqm.) and application methods i.e., broadcast & foliar spray on tea (Camellia sinensis L) seedlings in the nursery of National Tea Research Inst. Shinkiari during March to December 1999. Seedling for their plant height (cm), number of leaves, root length & root weight (gms) were observed. In the treatments of T4 & T5 Urea at 8 & 4 gm/sq.m (foliar spray) was found significant among each others in plant height, number of leaves, root length and root weight. However number of leaves and root weight were non-significant among each other`s. The seedlings treated in T2 and T3 by NPK as broadcast at 8 .8 & 4 gm/sq.m for (plant height, root length & root weight) were remained non-significant among each others except number of leaves and root weight respectively. Where as T1 (control) remained non-significant among all the treatments in all parameters. Urea at 8 & 4 gm/sq.m (foliar spray) showed the best performance in all the parameters statistically.
  Amir Zaman Khan , M. Akhtar , R. Ahmad , N. Ahmad and P. Shah
  Protein and oil contents of soybean varieties were significantly affected by planting date and plant density. Late planted crop gave more protein content than early planted crop, while an inverse relationship was found for oil content. Lower plant density of 200 thousand plants ha -1 gave significantly more protein content than higher plant densities of 400 and 600 thousand plants ha -1 and the same response was observed for oil content but the difference among the plant densities did not reach the 5% significance level. Epps produced more protein and oil contents than William-82. There was no effect of plant density on Oil concentration in seeds of William -82, however Oil concentration in seeds of Epps decreased with increase in plant density, indicating differential response of Oil concentration in seeds of the two soybean varieties.
  M. A. Naeem , R. H. Qureshi , M. Aslam , R. Ahmad , N. Ahmad , A. Hussain , M. Saleem and K. Hussain
  In order to determine genetic diversity of NRI against NaCl salinity, a study in hydropnic system was carried out with 60 plants of NRI at 70 ml m-3 NaCl salinity. Plants were grown up to maturity and on the basis of growth and paddy yield, the plant population of NR-I was divided into five tolerance classes and corresponding values of K+, Na+, Cl-, K:Na and P:Zn ratio were averaged and relationships of these parameters with the salt-tolerance character was evaluated. The study revealed that salt tolerance of various population groups was correlated with the exclusion of Na+ and Cl-, better maintenance of K+, high K:Na and low P:Zn ratios in the leaves. The chemical composition of leaves depends upon the age of the leaf.
  Amir Zaman Kha , M. Akhtar , M. Riaz , N. Ahmad and P. Shah
  Not Available
  F. Subhan , M. Anwar , N. Ahmad , A. Gulzar , A. M. Siddiq , S. Rahman , I. Ahmad and A. Rauf
  An experiment was conducted at Cereal Crops Research Institute Pirsabak Nowshera during 2000-01 to study the effect of gamma radiation at the rate of 10, 20 and 30 Krads on growth and yield of barley fertilized with 30,60 and 90 kg ha-1 of nitrogen. Nitrogen was applied in split doses at sowing and tillering stages with 100 kg ha-1 of Single Super Phosphate (SSP) as a basal dose. Nitrogen significantly increased plant height, straw yield, 1000-grain weight and grain yield. The application of 90 kg N ha-1 produced 3875 kg of grain and 13667 kg ha-1 straw yield. Irradiation had positive effects on grain yield with maximum production at the rate of 10 krads of gamma rays. An increase in straw yield was also observed with increase in radiation doses, where maximum straw yield was recorded with 30 krads of radiation. Moreover, spike length and 1000-grain weight were also significantly increased with radiation. The interaction of both variables in most cases was significant with positive relation ships with the characters studied in the experiment.
  Y. Ali , M.A. Haq , N. Ahmad and S.S. Alam
  Ten genotypes of chickpeas viz. CM-1, CM-2, CM-72, CM-88, CM-1918, C-44, K-850, C-727, Thal White and 86135, were compared for their relative drought tolerance in terms of yield and yield components in field experiment. The genotype CM-2 proved superior to other varieties in almost all the characters studied. It produced maximum number of pods per plant (87.20), gave the highest yield per plant (18.97 g), and more elliptic index of leaf (71.81) under stress conditions. Based on these characters this genotype may be advanced further.
 
 
 
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