Yazar "Caliskan, S" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim
    Öğe
    Different irrigation methods and water stress effects on potato yield and yield components
    (Elsevier Science Bv, 2005) Onder, S; Caliskan, ME; Onder, D; Caliskan, S
    This research was conducted during the spring seasons of 2000 and 2002 in Hatay province located in the East Mediterranean Region of Turkey. The research investigated the effects of two drip irrigation methods and four different water stress levels on potato yield and yield components. The surface drip (SD) and subsurface drip (SSD) irrigation methods were used. The levels were full irrigation (I-100), 66% of full irrigation (I-66), 33% of full irrigation (I-33) and un-irrigated (I-0) treatments. Five and three irrigation were applied in 2000 and 2002 early potato growing seasons, respectively. Total irrigation amount changed from 102 to 302 mm and from 88 to 268 mm in 2000 and 2002, respectively. Seasonal evapotranspiration changed between 226 and 473 mm and 166 and 391 mm in 2000 and 2002, respectively. SD and SSD irrigation methods did not result in a significant difference on yield. However, SD method has more advantages than SSD method, which has difficulties in replacement and higher system cost. Irrigation levels resulted in significant difference in both years on yield and its components. Water stress significantly affected the yield and yield parameters of early potato production. Water deficiency more than 33% of the irrigation requirement could not be suggested. Water use efficiency (WUE) of SD irrigation methods had generally higher values than SSD irrigation methods. Treatment I-33 gave maximum irrigation water use efficiency (IWUE) for both years. SSD irrigation method did not provide significant advantage on yield and WUE, compared to SD irrigation in early potato production under experimental conditions. Therefore, the SD irrigation method would be recommended in early potato production under Mediterranean conditions. (c) 2004 Elsevier B.V. All rights reserved.
  • Küçük Resim
    Öğe
    Effects of cultivar maturity on growth and yield of double cropped soybean
    (Taylor & Francis As, 2006) Arslan, M; Isler, N; Caliskan, S
    Maintaining yield potential or reducing yield losses is very important for soybean [ Glycine max ( L.) Merr.] double cropping to be profitable. Our objectives were to study the effects of cultivar maturity on yield, yield components and to determine adaptation and yielding potential of 18 soybean cultivars ( six cultivars in each of the maturity groups II, III and IV) in the eastern Mediterranean region of Turkey in 2000 and 2001. The experimental design was randomized complete block with three replications. Effects of maturity group ( MG) on seed yield, yield components, and key phenological stages were significant. Cultivars in MG IV had significantly higher seed yield, plant height, lowest pod height and number of nodes/ plant than cultivars in MG II and III. Among cultivars, the highest seed yield was obtained from KS4895 ( MG IV) with 3.75 t/ha and the lowest was obtained from Dwight ( MG II) with 1.18 t/ha. Except for the number of seeds/pod, all of the measured yield components and key phenological stages were significantly and positively correlated with seed yield. Based on the path analysis of the combined data, it was found that the number of seed/m(2), the period from VE to R1 and from R1 to R7 had greatest positive direct effect on seed yield. The results of the current study showed that cultivars in MG IV were best adapted and best suited for a wheat-soybean double cropping system in the eastern Mediterrenean region of Turkey.