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    Effect of N-fertigation Frequency on the Lint Yield, Chlorophyll, and Photosynthesis Rate of Cotton
    (Tarbiat Modares Univ, 2015) Cetin, O.; Uzen, N.; Temiz, M. G.
    The objectives of this study were to evaluate the effects of nitrogen fertigation frequency on lint yield, lint properties, chlorophyll content (SPAD readings), and the photosynthesis rate (PR) of cotton. This study was carried out in the Southeastern Anatolia Region of Turkey in 2011 and 2012 with drip-irrigated cotton. The maximum lint yield (1,856 kg ha(-1)) was obtained with one lateral for every two rows and the application of equal doses every two irrigation cycles (10 days). Fertigation frequency of every two irrigation cycles (10 days) increased (P <= 0.05) the fiber strength (32.3 g tex(-1)), the fiber elongation (6.5%), and the fiber length (28.9 mm). The SPAD readings ranged from 40.1 to 54.9, depending on the treatment and experimental year. There was no significant difference (P <= 0.05) among the SPAD readings. The PR ranged from 35.9 to 74.7 mu mol m-(2) s(-1), and there was no significant difference between the treatments. One possible reason for the lack of difference in PR, or SPAD, was that there was no difference in the total amount of nitrogen applied in the different treatments. The PR measured in cotton leaves may also change depending on the environmental conditions during measurement, prevailing ecological conditions, age, and location of the leaf on a plant.
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    USE OF WASTEWATER FOR AGRICULTURAL IRRIGATION AND INFECTIOUS DISEASES. DIYARBAKIR EXAMPLE
    (Scibulcom Ltd, 2016) Uzen, N.
    In order to meet the demand for scarce water resources, which decrease in quantity and quality in many countries, especially domestic waste water is primarily treated and re-used. Discharging of waste water is an important resource to meet water demand in addition to achieving the minimum flow in rivers. Treated wastewater could be used as an alternative water resource in many areas especially in landscaping and irrigation of major agricultural products. Wastewater treatment level and accuracy requirements vary based on the field of use. Biological treatment requires taking into consideration of the public health in agricultural irrigation. Treated wastewater used in agricultural irrigation could meet a portion or all nutrient requirements for plant growth. In addition, particularly heavy metals and excessive amount of certain pathogens might have caused the adverse effects on human health and also soil accumulation. Therefore, certain basic standards must be established even if wastewater was treated for the purpose of utilisation. In this study, the suitability of treated wastewater for irrigation and the possible effects on public health were discussed. Additionally, infectious diseases arising from the drinking and potable water were examined in Diyarbakir Province between the years 2005-2015.