Browsing by Author "Ülker, M."

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Effects of Fallow-Wheat and Lentil-Wheat Rotation Systems on Wheat Yield and Soil Water Storage in Dry Farming Areas
(Asian Network for Scientific Information, 2007) Ülker, M.; Çiftçi, V.
This research was carried out on dry farming areas in four locations around Van lake Basin in the eastern Turkey between 1998 and 2001. The aim of the experiment was to determine the effects of fallow and winter lentil (Lens culinaris) on wheat (Triticum aestivum) yield and the available water content in soil layers between 0 and 120 cm after fallow and lentil treatments. The experimental design was a randomized block with 4 replications. The results indicated that the highest water contents occurred in fallow plots in all locations. The highest fallow efficiency was observed in Erciş (9.4%) and the lowest was in Adilcevaz (-8.8%). Wheat yield was significantly reduced by lentil in all locations. Growing winter lentil was more profitable than fallow. Therefore, wheat-winter lentil rotation system is recommended in all locations. © 2007 Asian Network for Scientific Information.
Effects of Various Plant Densities and Nitrogen Doses in Some Triticale (X Triticosecale Wittmack Ex. A. Camus) Cultivars in Van City Ecological Conditions
(Centenary University, 2016) Oral, E.; Ülker, M.
This study was conducted by randomized blocks divided by split-split plots trial design with three replications in Van city ecological condition 2009-2010 and 2010-2011 years. The research was planned and carried out with 4 nitrogen doses (2.7, 5.4, 8.1, 10.8 kg N/da) × 3 cultivars (Presto, Mikham-2002, Karma-2000) × 4 seed rate (350, 450, 550 ve 650 seed/m2) × 3 replication =144 parcel. According to the average of years, the plant height has been changed between (113.3-106.8) cm; the number of ears per square meter between (620-572) number; the number of grains per spike between (46.0-44.2); thousand grain weight between (40.4-38.7) g and grain yield between (3437-3270) kg ha-¹ respectively. Among the studied agricultural characters, plant height, the number of spike per square, the number of grains per spike and grain yield were increased depending on increasing nitrogen dose and sowing density in all varieties. In this study, according to the average years the high grain yield (5203 kg ha-1) was obtained from Karma-2000 variety, the third frequency (550 seed rate m-2) and the fourth dose of nitrogen (108 kg N da-1) application. Accordingly, Karma-2000 demonstrated superior performance in terms of plant height, spike number per square meter, number of grains per spike and grain efficiency. It was concluded that Karma-2000 varieties can be grown in the Van city ecological condition and winter with success. © 2016, Centenary University. All rights reserved.
Exploring Adaptation Abilities of Barley Genotypes in Van Growing Conditions for Biomass and Grain Yield
(Centenary University, 2023) Salih, S.; Öngün, B.; Özdemir, B.; Oral, E.; Altuner, F.; Demir Atmaca, Ş.; Ülker, M.
Discovering the variation among genotypes is an important criterion for selecting the suitable cultivar for a certain environment. The study aimed to explore the genetic variation among 17 genotypes of barley based on grain yield and some related traits. Plants were grown under field grown conditions in the 2019-2020 and 2020-2021 growing seasons, and plant height (PH), spike per square meter (SSM), spike length (SL), spikelets per spike (NSS), seed per spike (SPS), biological yield (BY), grain yield (GY), and thousand grain weight (TGW) were measured. Results indicated that PH ranged (51.7 to 81.33 cm) and (58.20 to 79.90 cm), SSM (374 to 582) and (418 to 701), SL (7.10 to 9.63 cm) and (6.87 to 9.13 cm), NSS (9 to 15) and (8 to 17), SPS (21 to 49) and (21 to 51), BY (3466.7 to 5905.3 kg h-1) and (3731.7 to 6080 kg h-1), GY (1442 to 2192 kg h-1) and (811.8 to 1763.7 kg h-1), TGW (34 to 55.67 g) and (33.47 to 52.63 g) for the first and second year of experiment respectively. The advanced lines measurement values were higher in the second year of the experiment. It can be concluded that the advanced lines Anka-08 and Anka-11 are promising in most of the parameters. Some of the old and new cultivars still preserve their yield potential. © 2023, Centenary University. All rights reserved.
The Relationships Among Grain Yield and Some Yield Components in Tir Wheat
(TUBITAK, 1999) Sönmez, F.; Ülker, M.; Yilmaz, N.; Ege, H.; Bürün, B.; Apak, R.
Field experiments were conducted in 1994 and 1995 in Van in order to study the relationships between grain yield and yield componets, and the interrelationships among these yield components and other characteristics in Tir wheat. In this research, heading duration, the number of spikes per m2, grain filling period, the number of grain per spike, grain weight, and grain yield were studied. Direct and indirect effects of the yield components (the number of spikes per m2. the number of grain per spike, and grain weight) on grain yield were found by Path coefficient analysis. Direct and indirect effects of other characteristics on these components were also determined. The direct effects, obtained in the Path coefficient analysis, indicated that grain yield depended mainly upon spike number per m2 and secondly upon the grain number per spike. Grain weight showed less influence. On the other hand, duration had a highly negative influence on the grain filling period. At theend of the research, it has been found possible to increase grain yield when spike number per m2 used as a selection criterion in Tir wheat.