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    The impact of different seeding dates on seed yield of soybean
    (2012) Karaaslan D.; Hakan M.; Ekinci R.; Boydak E.
    This study was conducted to determine the effect of six different seeding dates (15th April, 1stMay, 15th May, 1st June, 15th June and 30th June) on the yield and yield components of the soybean. The experimental design was a randomized complete block with split plot having four replicates. The studies were conducted at GAP International Agricultural Research and Training Center in 2004, 2005 and 2006 years. The results indicated that the cultivars were significantly influenced by the different seeding dates for the traits of plant height (PH), first pod height (FPH), pod number (PN), weight for 100 seeds (SW), seed yield (SY), oil yield (OY) and protein yield (PY), It was observed that cv. NE3399 had the highest seed yield while the lowest seed yield was given by UMUT2002.
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    Influence of nitrogen applications on seed yield and chemical ingredient of winter rapeseed
    (Chemical Publishing Co., 2008) Karaaslan D.; Sürücü A.; Doran I.; Yildirim M.
    In this experiment, it was purposed to investigate effects of different nitrogen applications on seed yield, oil and protein content and nutrient uptake of winter rapeseed grown at field conditions. Three cultivars of winter rapeseed (Brassica napus L.) askona, karola and silvia, were used. The nitrogen applications applied to the soil were 0, 60, 120 and 180 kg N ha-1 as ammonium sulfate. Nitrogen concentration increased seed yield compared to untreated plants in all three cultivars. The highest seed yield was obtained from the plants received the highest nitrogen rate (180 kg N ha-1) for all three cultivars. When compared to seed yield of cultivars, the highest seed yields was in cultivar, askona with 180 kg N ha-1 and the lowest one was in the askona without nitrogen application too. The protein contents in all three cultivars were increased with the highest nitrogen content compared to untreated plants. However other nitrogen applications did not change protein content consistently. The changes in oil content were also not consistent among nitrogen levels and cultivars. Different nitrogen doses resulted in changes in nutrient levels in leaves of all three cultivars in some way. It can be revealed that nitrogen application at right doses can increase seed yield, oil and protein contents by increasing macro and micro nutrition of plants.