النشر العلمي

  • Determination of crop coefficients, water requirements and water productivity for maize (Zea mays L.) under central Gezira clay soil conditions, Sudan

Development of site specific crop coefficients (Kc) helps tremendously in irrigation management and furthermore provides precise water application in the region. This study was conducted at the Experimental Farm, University of Gezira, during seasons 2014/15 (first season) and 2015/16 (second season) to estimate crop coefficients (Kc), crop water requirements (CWR) and water productivity (WP) of maize cultivar Hudaiba2. The reference evapotranspiration (ETo) was calculated using the FAO computer program (CROPWAT). Actual crop evapotranspiration (ETc) was estimated by the gravimetric method. Crop coefficients were derived from the relationship between reference evapotranspiration and actual crop evapotranspiration.  The results showed that crop coefficients values for maize were 0.51 and 0.47 for initial stages, 1.26, and 1.15 for the mid stages and then decreased gradually to 0.53 and 0.42 for the late stages, in the first and second season; respectively. The peak Kc occurred during the period 60 to 70 days after sowing (DAS), coinciding with the maximum ETc of 6.75 mm/day at the mid-season stage for maize. The crop consumptive water use of maize were 491 mm (4910 m3/ha) for the total growing period. The mean yield of maize was 4285kg/ha and the crop water productivity was 0.58 kg/m3.

 

published in GEZIRA JOURNAL OF AGRICULTURAL SCIENCE

  • Coordination Effect of Plasma Pre-Treatment on Alkaline Etching and Deep Coloring of Polyethylene Terephthalate Fabrics

The conventional textile dyeing process involves a high consumption of water, chemicals and energy. Therefore, the textile industry has a great interest in novel technologies with energy and resources-saving. Plasma technology received enormous attention as an environmental-friendly thenology. In this work, synergistic effect of atmospheric pressure plasma on alkaline etching and deep coloring of dyeing properties on polyethylene terephthalate (PET) fabrics was investigated. The weight loss percentage of PET fabric treated by alkaline and O2/Ar plasma has been more than the total amount of the fabric by the two treatments separately. The K/S value and color strength of PET fabrics by various plasma pre-treatment times was increased. It indicated that plasma pre-treatment has synergistic effect on alkaline treatment of PET fabrics, which could be obtained at low temperature.

published in Fiber Society

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