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Articles by A.S. Juraimi
Total Records ( 6 ) for A.S. Juraimi
  M.A. Hakim , A.S. Juraimi , M. Begum , M. Hasanuzzaman , M.K. Uddin and M.M. Islam
  Problem Statement: Groundwater is an important source of freshwater for agricultural, drinking and domestic uses in many regions of the world including Bangladesh. Demand of groundwater has been increasing day by day for irrigation by bringing more area under cultivation. As a drinking water the bottled water market currently has an average annual growth rate of 7.4% between 2002 and 2007, which is parallel to the growth of this industry all over the world. Obviously, the feed water should be free of particles and colloidal material and as low as possible in soluble organic matter. Series of water quality problems have been identified and addressed since the 1950s. These include point and non-point source pollutants such as nutrients, hydrocarbons, pesticides and heavy metals. In this regard, some studies to assessment the quality of water had been conducted in world wide. Where as, a Chiribandar a selected southern part of Bangladesh has great importance in agriculture and industrial perspective, no study has been done yet to asses the ground water quality for agricultural, drinking and industrial uses. Approach: A research was conducted to assess the degree of ionic toxicity of groundwater sources as irrigation, drinking and industrial purposes. Twenty eight groundwater samples were analyzed for different elements of dominant cations and anions such as Ca, Mg, Na, K, Fe, HCO3 and other minor ions P, B, As, N03-N, S04-S and Cl. In addition, to classify water quality as excellent, good suitable, Sodium Adsorption Ratio (SAR), Soluble Sodium Percentage (SSP) and Residual Sodium Carbonate (RSC) were calculated following standard equations. The quality of water is generally judged by its total salts concentrations, relative proportion of cations or Sodium Absorption Ratio (SAR) and the contents of HCO3. Results: According to the concentration of cation and anion constitutes of groundwater, water quality of study area were suitable for irrigation, drinking and industrial purposes. Except for a few cases there was neither chloride toxicity nor sulphate acidity in the area. The content for NO3- and P was negligible and water samples were 'good' to 'excellent' with respect to boron and SSP. Range of EC (361-802 µS cm-1) and that of SAR (0.23-0.54) indicated that all samples were in 'medium-salinity low-alkali' hazard class. In respect of TDS and RSC values, all samples were of fresh water and suitable class. Among SSP and SAR, TDS and EC were highly correlated. An Arsanic range was far below than recommended upper limit. Conclusion/Recommendations: In respect of all evaluating criteria, groundwater of all the 28 locations can be safely used for long-term irrigation and drinking purposes. All samples were found suitable for drinking and industrial purpose in consideration of Fe concentration. However, none of the water samples was suitable for industrial use, because of higher TDS and pH values exceeding recommendation.
  Jugah B. Kadir , A. Ahmad , M. Sariah and A.S. Juraimi
  The possibility of using an indigenous plant pathogen to control itchgrass (Rottboellia cochichinensis) was investigated in this study. A fungal pathogen of itchgrass, Exserohilum longirostratum, was determined in the laboratory and greenhouse as a potential bioherbicide. The disease symptoms on inoculated plants appeared 24 h post inoculation as discrete spot with watery dark border, eventually expand and cause extensive necrosis on the leaves, resulted in burnt-like symptom. When applied as a post emergence foliar spray, the fungus inflicted high percentage of mortality to young itch grass seedlings It did not killed older plants but was capable of reducing biomass by about 56% when the plants were inoculated with 3.5x105 conidia mL-1. Media containing carbon: nitrogen ratio of 10:1 as in V8 juice agar and PDA produced more conidia compared to medium (CMA) containing carbon:nitrogen ratio of 40:1. Light and temperature had major influence on fungal sporulation, exposing the fungus to longer duration (12 h) of light significantly increases conidia production. The optimal temperature for growth and sporulation of this fungus is in the range of 25 to 30°C.
  M. Begum , A.S. Juraimi , S.R. Syed Omar , A. Rajan and M. Azmi
  This research was conducted in the glasshouse at Universiti Putra Malaysia to determine the influence of nitrogen fertilization and cohorts of emergence on plant survival and reproductive capacity of Fimbristylis miliacea. One hundred seeds were sown on the surface of the saturated soil in the buckets. The treatments were without nitrogen (N) and with 170 kg N ha-1. The experimental design was CRD with eight replications. Fimbristylis miliacea seedling emergences was recorded weekly up to 4 weeks and were considered as 1st, 2nd, 3rd and 4th cohorts, respectively. Considering the repeated observation of emergence cohorts, statistical analysis was done as a split plot design where N treatment was considered as main plot and emergence cohorts was subplot by using the SAS statistical software and means were tested using Tukey`s studentized range test at the 5% level of probability. Percentage emergence and percentage survival data were transformed into square root values and cumulative cohort data for all parameters were analyzed using unpaired t test to determine N effects. The nitrogen had no influence on F. miliacea emergence. Whereas, high death rates in F. miliacea among young seedlings indicated a Deevey Type III survivorship curve and higher number of deaths occurred in late emerging cohorts (4th cohorts) especially when nitrogen was applied. Early emerging cohorts had greater survivorship and contributed most extensively to the next generation by producing more than 90% seeds irrespective of nitrogen treatment. Fimbristylis miliacea plants establishing from every 100 seeds can reproduce 287,722 seeds with nitrogen treatment, which was 1.65 fold greater than without nitrogen.
  M. Begum , A.S. Juraimi , S.R. Syed Omar , A. Rajan and M. Azmi
  The experiment was conducted in the glasshouse at Universiti Putra Malaysia to determine the efficacy of herbicides with different modes of action against a Fimbristylis miliacea population and increased rice yield potentiality. Nine early post emergence herbicide treatments such as bensulfuron, cinosulfuron, pyrazosulfuron, cinosulfuron+pretilachlor+safener, 2, 4-D (amine), pretilachlor+safener, bentazone, fentrazamide+propanil and bispyribac-sodium were applied singly or in mixtures. A weed-free (hand-weeded) treatment and an unweeded treatment served as controls. The treatments were arranged in a randomized complete block design with four replications. A weed-free (hand-weeded) treatment and an unweeded treatment served as controls. The treatments were arranged in a randomized complete block design with four replications. Data on crop phytotoxicity, weed control, chlorophyll content, plant height, productive tillers, total tillers, panicle length, grains per panicle, 1000 grain weight, % filled grains per panicle, grain yield and straw biomass were recorded to evaluate efficacy of the different treatments. All tested herbicides were effective in controlling F. miliacea, but the herbicides bensulfuron and fentrazamide+propanil increased grain yield by more than 80% compared to the unweeded treatment and were comparable to the weed-free treatment.
  M.A. Hakim , A.S. Juraimi , M.R. Ismail , M.M. Hanafi and A. Selamat
  This study aimed to develop appropriate weed management technology on selected salt tolerant rice variety(s) as well as to develop package of production technologies for rice in saline environments of Malaysia. This study was conducted at 40 different rice fields in 10 blocks of Kedah coastal area of West Malaysia during June-July, 2009 to identify most common and prevalent weeds associated with rice. Fields survey were done according to the quantitative survey method by using 0.5x0.5 m size quadrate with 20 samples from each field. A total of 42 different weed species belonging to 17 families were identified of which 25 annual and 17 perennial; 9 grassy weeds, 11 sedges and 22 broadleaved weeds. Leptochloa chinensis, Echinochloa crusgalli, Fimbristylis miliacea, E. colona, Cyperus iria, Sphenoclea zeylanica, Cyperus deformis, Oryza sativa spontanea, Scirpus grossus and Jussia linifolia were most frequent species covering more than 50% fields. Based on relative abundance indices, annuals were more dominant than perennials. Leptochloa chinensis, Echinochloa crusgalli, Fimbristylis miliacea, E. colona were most dominant weed species in the coastal rice field of Kedah.
  H. Alloub , A.S. Juraimi , J. Kadir , S. Sastroutomo and M. Begum
  The experiments were conducted to evaluate the potential of the Exserohilum prolatum as a mycoherbicide for the itchgrass (Rottboellia cochinchinensis) control under natural conditions in two field experiments in a non crop situation and in association with a maize crop. Three doses were (single, double and triple) applied to the main plots with 2 week intervals. The sub-plot treatments were distilled water solution (check), the Exserohilum prolatum conidial concentration of 2x107, 2x108 and 2x109 conidial mL-1 or glyphosate (N-(phosphonomethyl) glycine) herbicide as control check. Disease severity was rated at 5 day intervals after application and the area under disease progress curve (AUDPC) was calculated for each treatment. The above ground parts of the itchgrass and maize were recorded at the end of the experiment. The results showed that application frequency and inoculum concentration greatly influence the itchgrass control. Significantly higher percentage control of the itchgrass were recorded from triple application frequencies (90.4%) compared to single (62.4%) and double (70.4%) applications. Within the three frequencies of application, increasing inoculum concentration increased the itchgrass control from between 53 to 90.4% compared to untreated check. The results indicate that the E. prolatum has a good potential as a biocontrol agent for the itchgrass.
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