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Articles by Munir A. Turk
Total Records ( 5 ) for Munir A. Turk
  Munir A. Turk and Abdel-Rahman M. Tawaha
  Field experiments were conducted during the two growing seasons of 1999/2000 and 2000/ 2001 in Northern Jordan to detect the influence of varying N rates and ethrel application on yield, yield components, and phenolological traits of irrigated winter wheat. Ethrel (2-chlorethyl phosphonic acid) application after stem elongation enhance the grain yield of irrigated winter wheat by increase spikes plant -1, spikes m -2, and altering grain filling processes. When ethrel was applied, lodging in plots that received higher N rates was slightly greater than lodging in plots fertilized at low N rates. Among N rates the highest grain yield was obtained under 120 kg N ha -1.
  Munir A. Turk , Abdel-Rahman and M. Tawaha
  Aqueous extracts of Brassica nigra leaf, stem, flower and root plant part were made to determine their effects on germination and dry weights of hypocotyl, and radicle length of 8-d old lentil seedlings over a range of extract concentrations. Increasing the aqueous extract concentrations of separated Brassica nigra plant parts significantly inhibited lentil germination, seedling length and weight. Radicle length was more sensitive to extract source than seed germination or hypocotyl length. Based on 8-d-old lentil plant radicle length growth, averaged across all extract concentrations, the degree of toxicity of different Brassica nigra plant parts can be classified in order of decreasing inhibition as follows: leaf, flower, mixture of all plant parts, root and stem. It is difficult to apply our results to a production situation directly, because the concentration of inhibitory substances in aqueous extracts is probably greater than what would be observed under natural conditions.
  Munir A. Turk , Abdel Rahman and M. Tawaha
  Field experiments were conducted during the two growing seasons of 1999/2000 and 2000/ 2001 in northern Jordan to detect the influence of varying seeding rates and weed control methods on yield, yield components, and phenological traits of irrigated winter wheat. Seeding rate of 140 kg ha-1 produced the maximum grain yield ha-1. At this density, it also exhibited the lowest spikes plant-1, grains spike-1 and thousand grains weight. Whereas at the density of 100 kg ha-1, a minimum yield of 1882.5 kg ha-1 was obtained owing the lesser number of plant per unit area. Weed control methods hand significant effect on yield, yield components, and phenological traits. Hand weeding provided the better weed control 2,4-D application at stage 22-28 (2-8 tillers detectable) also produced significantly higher grain yield as compared to unsprayed control. The only weed control treatments, that reduced wheat yield was 2,4-D applied at stage 43 (mid boot stage, flag leaf sheath just visible swollen).
  Munir A. Turk , Abdel-Rahman and M. Tawaha
  A 2-years field study was conducted during the rainy seasons of 1999 and 2000 at Houfa in northern Jordan, to know the performance of two sorghum genotypes (Izra3 and Razini) and their response to monthly hand weeding and 2,4-D application at different growth stages. Izra3 gave significantly higher grain yield of 2800 and 3150-kg ha-1 during 1999 and 2000, respectively. Differences in weed number and fresh weight were significant among various treatments in both seasons. In both growing seasons, yield reductions occurred when 2,4-D was applied to sorghum at stage 21 (beginning of tillering, first tiller detectable) and stage 30 (beginning of stem elongation). Hand weeding was more effective than 2,4-D in suppressing weed growth.
  Abdel- Rahman , M. Tawaha and Munir A. Turk
  Field experiments were conducted during the winter seasons of 1998-1999, and 1999- 2000 in northern Jordan, to study the effect of date and rate of sowing on the yield and yield components of lentil (Lens culinaris Medik.). Progressive delay in sowing beyond 1st December a yield reduction of 20.8 and 40.1 % was recorded with successive delays in sowing at every 20 days interval. Plant height, primary branches plant–1, secondary branches plant–1, number of pods plant–1 and 100-grains weight followed the same trend as yield. Seed yield was not significantly affected by sowing rate.
 
 
 
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