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    Performance of organic manures alone or combined with chemical fertilizers in increasing growth, yield, and nutritional quality of potatoes in the Eastern part of Turkiye
    (Taylor & Francis Inc, 2024) Kurt, Gunes; Ozturk, Erdogan; Sefaoglu, Firat; Gul, Volkan; Toktay, Zehra; Mosber, Goltay
    This study aimed to determine the effects of different types of fertilizers (organic and inorganic fertilizers) on plant growth, yield, and yield components of potatoes grown in the high-altitude plateau of eastern Turkiye in 2017 and 2019. In the experiment, single or combined doses of nitrogen (N; as ammonium sulfate) and phosphorus (P; as triple super phosphate) as inorganic fertilizers and leonardite (L) and vermicompost (V) fertilizers as organic fertilizers were used. In both years, different fertilizer treatments significantly affected plant growth, yield, and yield components. Tuber yield per hill (941.0 g), marketable tuber yield (32.71 t ha(-1)), total tuber yield (37.84 t ha(-1)), specific gravity (1. 077 g cm(-3)), chip productivity (35.9%), starch (13.03%) and protein (11.0%) ratios increased when N fertilizer was used in combination with vermicompost or leonardite. N fertilizer combined with V or L fertilizer increased tuber yield under harsh continental climates, short growth periods, and high altitudes.
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    THE EFFECT OF DIFFERENT STORAGE DURATION PERIODS AFTER HARVESTING IN A SEMI-ARID ENVIRONMENT ON THE QUALITY COMPONENTS IN SUGAR BEET
    (Soc Field Crop Sci, 2024) Yildiz, Umut; Ozturk, Erdogan; Sefaoglu, Firat; Gul, Volkan; Toktay, Zehra
    The storage of the harvested sugar beet (Beta vulgaris L.) before the processing stage is crucial, particularly regarding quality and durability. To maintain the quality of the beet prior to processing, appropriate storage conditions must be provided. Although siloing is a standard method for beet storage, this process may have some negative effects. Given the limited information on the impact of siloing on yield and quality, it is essential to determine the optimal duration of siloing. This study investigated the effect of different siloing periods on the root and weight and quality criteria of sugar beet in 2020 and 2021. Four siloing periods (immediately after harvest, ten days after harvest, 20 days after harvest, and 30 days after harvest) were analyzed. The siloing periods significantly affected both the root weight and quality criteria in both years of research. It was determined that the examined characteristics were significantly influenced by the treatments, with weight loss, dry matter content, sugar content, and sugar yield of roots increasing with the length of the siloing period. The results highlight the importance of the waiting time during the siloing period for sugar beet stored in silos after harvest. To minimize losses in the examined characteristics, it is recommended that the processing occur immediately after harvest. If it must be delayed processing is recommended between 10-20 days post-harvest.
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    YIELD AND QUALITY PERFORMANCE OF DIFFERENT ROW SPACINGS ON CORIANDER GENOTYPES IN SEMI-ARID CONDITIONS
    (Pakistan Botanical Soc, 2026) Kalkan, Zeynep; Ozturk, Erdogan; Sefaoglu, Firat; Gul, Volkan; Polat, Taskin; Toktay, Zehra; Mosber, Goltay
    Increased plant population causes more in-row stress in plants, potentially reducing yield. Narrow row spacing can reduce stress by increasing plant-to-plant spacing within a row. Therefore, it is important to standardize plant row spacing according to various characteristics to achieve higher yield and quality. The purpose of the 2014-2015 study was to ascertain the impact of varying sowing distances (20, 30, 40, and 50 cm) between rows on the yield and agronomic traits of coriander genotypes (Gamze, Kudret, Telci). Four replications of the field research were set up using a Randomized Blocks Experimental Design. The results indicated that genotype, row spacing, and the genotype x row spacing interaction had a statistically significant impact on seed output, but the years had no discernible influence on seed yield. The production of seed and oil decreased as row spacing increased, while oil content increased. With 20-40 cm row spacing and 1683.4-1846.5 kg da(-1), the genotypes of Kudret and Telci produced the maximum seed production. Although the decrease in the number of branches and umbrellas in narrow row spacing had a negative effect on seed yield, the increase in the number of seeds per umbrella and the number of plants per unit area led to an increase in seed yield. When evaluated based on genotypes, although the Kudret and Telci genotypes gave the best results in terms of seed yield, the Kudret genotype gave the best results regarding essential oil ratio and essential oil yield.