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    Determinatinon of rice (Oryza sativa L.) genotypes suitable for drip irrigation
    (National Centre for Agrarian Sciences, 2015) Beser, N.; Surek, H.; Sahin, S.; Kaya, R.; Tuna, B.; Cakir, R.
    This study was carried out at Trakya Agricultural Research Institute during 2007 and 2009 to find out suitable rice genotypes for drip irrigation. Irrigation drip laterals with an emitter discharge rate of 2 L h-1 and emitter spacing of 0.30 m were used each plot. Distances between laterals was 80 cm. As a two years mean 789 mm water was given with drip irrigation (including seasonal rainfall). According to two year means, Akceltik had the lowest days to flowering and days to maturity with 85 and 116 days respectively, Aromatik-1 had the highest days to flowering with 102 days and YRF-203 had the highest days to maturity with 133 days respectively. Akceltik had the highest plant height with 98.1 cm and Kiziltan had the lowest plant height with 65.8 cm. YRF-203 had the longest panicle with 20.08 cm. Cultivar Edirne had the highest brown rice yield with 81.45% and Cultivar Gonen had the highest total rice yield with 70.76%. On the other hand Veneria had the highest head rice yield with 61.88%.The number of fertile panicle per square meter was the highest at cultivar Aromatik-1 (264/ m2). Genotype YRF-203 attained highest percentage of sterile spikelet (37.55%) while Akçeltik produced lowest percentage of sterile spikelet (8.83%). Maximum 1000 kernel weight was obtained from cultivar Negis. The genotype Veneria gained the highest biological yield (1.568 t/ha). Percentage of harvest index was the highest in genotype Kiziltan (47.5%) while it was lowest in genotype YRF-203 (21.3%). The highest yield (6.517 t/ha) was obtained with Duragan rice variety, it followed by Osmancik-97, Halilbey and Kiziltan with 6.238, 6.231 and 5.980 t/ha yield respectively. From this study, it was found that that Duragan, Osmancik-97 and Halilbey rice cultivars are adaptable for drip irrigation and these varieties could be grown under drip irrigation conditions with using about 50% less water than the flooded irrigation conditions. © 2015, National Centre for Agrarian Sciences. All rights reserved.
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    Evaluation of the effects of 2,6-dinitro-N,N-dipropyl-4-trifluoromethylanil herbicide on the groundwater contamination in the Thrace region
    (Scibulcom Ltd., 2016) Cebi, U.K.; Cakir, R.; Tok, H.H.
    The contamination effects of 2,6-dinitro-N,N-dipropyl-4-trifuoromethylanil (trifuralin) herbicide, widely used in sunfower farming were studied on the felds of Turgutbey irrigation project in Thrace region. Shallow irrigation water wells, drilled by farmers across the irrigation project covering approximately 320 ha felds, were evaluated in the study. Water samples collected from the irrigation wells at monthly intervals along the irrigation season, were analysed for trifuralin residuals. General evaluation of the results obtained during the years of the study showed, that residual concentrations determined in the well waters varied depending on location and time of sampling. It was found out also that the lowest and highest residual concentrations of trifuralin in water samples collected from the investigated wells, were 3.2 and 86.9 ppb, respectively. Higher residual concentrations in larger number of wells were available in the beginning of the season, and incidence as well as concentrations of herbicide residual decrease towards the autumn.
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    EVALUATION OF THE EFFECTS OF 2,6-DINITRO-N,N-DIPROPYL-4-TRIFLUOROMETHYLANIL HERBICIDE ON THE GROUNDWATER CONTAMINATION IN THE THRACE REGION
    (Scibulcom Ltd, 2016) Cebi, U. K.; Cakir, R.; Tok, H. H.
    The contamination effects of 2,6-dinitro-N,N-dipropyl-4-trifluoromethylanil (trifluralin) herbicide, widely used in sunflower farming were studied on the fields of Turgutbey irrigation project in Thrace region. Shallow irrigation water wells, drilled by farmers across the irrigation project covering approximately 320 ha fields, were evaluated in the study. Water samples collected from the irrigation wells at monthly intervals along the irrigation season, were analysed for trifluralin residuals. General evaluation of the results obtained during the years of the study showed, that residual concentrations determined in the well waters varied depending on location and time of sampling. It was found out also that the lowest and highest residual concentrations of trifluralin in water samples collected from the investigated wells, were 3.2 and 86.9 ppb, respectively. Higher residual concentrations in larger number of wells were available in the beginning of the season, and incidence as well as concentrations of herbicide residual decrease towards the autumn.
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    Impact of different water supply levels on yield and biochemical ingredients in broccoli
    (2013) Erken, O.; Oztokat Kuzucu, Canan; Cakir, R.
    This research was conducted to determine the impacts of different water supply levels on the yield and biochemical ingredients of the broccoli plant during the 2008 and 2009 growing seasons under the environmental conditions of Canakkale province, Turkey. The Maraton broccoli (Brassica oleracea L. var. Italica) species was grown in 10 lt pots with five different irrigation levels (80%, 60%, 40%, 20%), including the control treatment (100%), where the total quantity of moisture deficiency was replenished with each irrigation application. The results show there was a decline in yield parallel to the reduction in amount of irrigation water. During the first and second years of the research, the respective yields obtained were between 667.84 - 101.68 g plant-1 and 775.87 - 109.29 g plant-1. Data on the total leaf surface area, electrolytic conductivity of the tissues, and amount of sulfur and proline were also determined and used to estimate the water-yield, irrigation water-proline and irrigation water-sulfur interactions.