Browsing by Author "Candoǧan, Burak Nazmi"
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Item Effects of deficit irrigation on yield and quality of unheated greenhouse grown green bean(Wfl Publ, 2008-04) Büyükcangaz, Hakan; Yazgan, Senih; Ayas, Serhat; Candoǧan, Burak Nazmi; Ayas, Fusun; Uludağ Üniversitesi/Ziraat Fakültesi/Tarımsal Yapılar ve Sulama Bölümü.; Uludağ Üniversitesi/Ziraat Fakültesi/Bitkisel ve hayvansal Üretim Bölümü.; C-4137-2019; AAH-2934-2021; 6504449925; 14022195900; 25031127400; 14021271200; 25031095700This study was conducted to determine effect of deficit irrigation on yield for green bean grown under unheated greenhouse condition. The research was carried out at the Agricultural Research Station of Yenisehir High School of Uludag University in Bursa, Turkey, in 2007. In the study, water was applied to green bean as 100, 75, 50, 25 and 0% (as control) of evaporation from a Class A Pan corresponding to 2-day irrigation frequency. Irrigation water applied to crops ranged between 40 and 579 mm, and water consumption ranged between 47 and 582 mm. Irrigation treatments significantly affected fresh bean yield, length and width of green bean, number of seeds per pod, 100 bean weight and dry pod weights percent. The highest yields were 18.88 and 11.64 t ha(-1) for the K1(cp) and K2(cp) treatments, respectively. The lowest yield was found from K1(cp) as 3.26 t ha(-1). Crop yield response factor (k(y)) was 1.066. The highest values for water use efficiency (WUE) and irrigation water use efficiency (IWUE) were 32.44 and 26.98 and 27.74 and 21.29 kg mm(-1) for the K1(cp) and K3(cp) treatments, respectively. Under the conditions that water resources are scarce, it can be recommended that K3(cp) treatment is most suitable as a water application level for green bean irrigation by drip irrigation under unheated greenhouse condition.Item Effects of different irrigation levels on the vegetative growth, flower bud formation and fruit quality of sweet cherry in western part of Turkey(Wfl Publication, 2008-04) Demirtaş, Çiǧdem; Ertürk, Ümran; Yazgan, Senih; Candoǧan, Burak Nazmi; Soylu, Arif; Uludağ Üniversitesi/Ziraat Fakültesi/Bahçe Bitkileri Bölümü.; Uludağ Üniversitesi/Ziraat Fakültesi/Tarımsal Yapılar ve Sulama Bölümü.; AAG-7343-2021; 15847626100; 7801661220; 14022195900; 14021271200; 14054901500This research was carried out to determine the effects of different water application levels on the vegetative growth, flower bud formation and yield of sweet cherry trees irrigated by micro-sprinkler systems during the growing season 2002-2004. The trees were subjected to five irrigation treatments based on adjusted coefficients of Class A pan evaporation (0.50E(pan), 0.75E(pan), 1.00E(pan), 1.25E(pan), 1.50E(pan).). Mean yield per tree and trunk cross sectional area was 0.70-2.40 kg and 0.01-0.05 kg/cm(2) respectively at different irrigation water levels. Vegetative growth parameters and flower bud formation were not changed significantly except for the trunk diameter by the treatments at the end of the second year. Irrigation levels did not affect statistically significantly fruit quality parameters such as fruit weight, flesh/seed ratio, water soluble solids (%), pH, titratable acidity (g/100 ml) and inverted and total sugars. Only flesh firmness values were statistically significant at P<0.005 probability level with respect to the irrigation levels.Item Growth and quality responses of tall fescue (Festuca arundinacea Schreb.) to different irrigation levels and nitrogen rates(Soc Field Crop Sci, 2014) Candoǧan, Burak Nazmi; Bilgili, Uǧur; Yazgan, Senih; Açıkgöz, Esvet; Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü.; Uludağ Üniversitesi/Ziraat Fakültesi/Tarla Bitkileri Bölümü.; AAH-1539-2021; AAH-3102-2021; 14021271200; 6506803244; 14022195900; 6602817346A 2-year experiment was conducted to investigate the effects of different irrigation levels and nitrogen rates on visual turfgrass colour and quality and clipping yield of tall fescue (Festuca arundinacea Schreb.) under subhumid climatic conditions. The treatments consisted of five levels of irrigation, 25% (I-1), 50% (I-2), 75% (I-3), 100% (I-4) and 125% (I-5), of the evaporation measured from a Class A pan and two rates of nitrogen, 25 kg N ha(-1) (N-1) and 50 kg N ha(-1)(N-2). The N rates were applied as a monthly rate during growing seasons (May-September). The experimental area was irrigated by a pop-up sprinkler irrigation system. The irrigation was applied at 3-day intervals during May-September for both years. The seasonal crop evapotranspiration (ETc) under the treatments ranged from 315 to 1154 mm in 2007 and from 363 to 1100 mm in 2008. The ETc increased with increasing the both N rate and irrigation level, and the best seasonal turf quality of tall fescue was obtained for the I-4 and I-5 treatments under N-2 rate. This study demonstrated that, when the level of irrigation and nitrogen rate were evaluated together, the N2I4 treatment ensured sufficiently dark turf colour and quality. Based on the results of this study, it is concluded that an acceptable turf quality can be sustained under the N1I1 treatment in May, N1I2 treatment in June, July and August and N1I4 treatment in September (or N2I2 treatment in September) according to water conservation. When rainfall amountis high (132.2 mm) in September, the N1I1 treatment may sustain acceptable turf quality for this month.Item Yield, quality and crop water stress index relationships for deficit-irrigated soybean [Glycine max (L.) Men.] in sub-humid climatic conditions(Elsevier, 2013-02) Candoǧan, Burak Nazmi; Sincik, Mehmet; Büyükcangaz, Hakan; Demirtaş, Çiǧdem; Göksoy, Abdurrahim Tanju; Yazgan, Senih; Uludağ Üniversitesi/Ziraat Fakültesi/Tarla Bitkileri Bölümü.; Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü.; 0000-0002-0012-4412; AAH-2934-2021; AAG-9296-2021; AAH-3102-2021; AAH-1811-2021; 14021271200; 23989507900; 6504449925; 15847626100; 6603101276; 14022195900Field experiments were conducted for 2 years to evaluate the use of the crop water stress index (CWSI) for irrigation scheduling of soybeans under a sub-humid climate of Bursa, Turkey. Additionally, statistical relationships between CWSI and seed yield, quality parameters, crop evapotranspiration (ETc) and water use efficiency (WUE) were investigated. Irrigations were scheduled based on the replenishment of 100 (Two), 75 (T-75), 50 (T-50), 25 (T-25), and 0% (T-0) of soil water depletion from a soil depth of 90 cm using a 7-day irrigation interval. To compute CWSI, lower (nonstressed) and upper (stressed) baselines were developed based on the canopy temperature (T-c) measurements of fully irrigated and rain-fed treatments, respectively. According to results, CWSI could be used to determine the irrigation time of soybean for sub-humid climate and 0.22 could be offered as a threshold value. Statistically significant relationships were determined between CWSI and seed yield, protein yield, oil yield, ET c and WUE. The polynomial relationship between WUE and CWSI demonstrated that highest WUE could be obtained under CWSI close to 0.6. Consequently, an irrigation schedule that considers water stress could be employed when the cost of water is high and/or water is scarce. However, because of the yield reduction, all economic aspects of water limited irrigation scheduling should be considered before making this decision. We conclude that the CWSI could be used to evaluate crop water stress and improve irrigation scheduling for soybeans under sub-humid climatic conditions.