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    Effects of Secondary Tillage Implement on Some Properties of Soil and Yield of Sunflower
    (Univ Namik Kemal, 2007) Kayisoglu, B.; Bayhan, Y.; Taseri, L.
    In this study, field cultivator (FC), disk harrow (HD), combination of cultivator with spring teeth and rotary harrow (CS+RH) were used as secondary tillage equipment in spring. Physical properties of soil such as bulk density, porosity, mean weight diameter and aggregate stability were determined before and after tillage. Moreover, effect of different seedbed preparation techniques on yield of sunflower was also investigated. In the result of the study, differentiations among the secondary tillage equipment were observed due to bulk density and porosity. Small sized aggregates (1-5mm) were highly in tillage with combination of cultivator with spring teeth and rotary harrow. While the mean weight diameter, which shows the durability of aggregates to water, was 2.83 mm before tillage, it was 3.96 mm in tillage with DH, 1.80 mm in tillage with FC and 2.50 mm in tillage with combination equipment. Although the mean weight diameter in tillage with DH increased, decreased in tillage with FC. The best aggregate stability obtained from seedbed preparation by disc harrow. On the other hand field cultivator is the most affective soil embossing tool while the cultivator with spring teeth rotary harrow combination is smashing. The yield values were found 2.002 Mg ha(-1) with DH, 2.106 Mg ha(-1) with FC, 2.175 Mg ha(-1) with CS+RH.
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    Sultani Çekirdeksiz Üzüm Çeşidinde Farklı Kurutma Yöntemlerinin Kurutma Kinetiği, Enerji Tüketimi ve Ürün Kalitesi Açısından İncelenmesi
    (Namik Kemal University - Agricultural Faculty, 2020) Karacabey, E.; Aktaş, Türkan; Taseri, L.; Uysal Seçkin, Gamze
    Sultana Seedless grape samples were dried using hot air and microwave methods in different temperature and power levels with untreated conditions and drying kinetics and energy consumption values based on method were revealed in this study. Hot air drying experiments in electric forced convection oven were conducted in temperatures of 50, 60 and 70 oC with 1 m s-1 air velocity. Microwave drying experiments were conducted in 180 and 270 W power levels. Wang and Singh, Henderson-Pabis, Newton and Logaritmik thin layer drying methods offered in the literature were used to evaluate experimental values and it was determined that Wang and Singh model represents the drying characteristics of Sultana seedless grape as the best for both methods. Phenolic content and browning index increased with temperature rise in hot air method. Minimum drying time was obtained as 10 hours in 70 °C hot air drying and 35 minutes in 270 W microwave power level for decreasing moisture content of 200 g grape samples from 75 % (w.b.) to 20 % (w.b.). Minimum specific energy consumption was determined as 19,15 kWh kg-1 in 70 oC hot air drying and 1,52 kWh kg-1 in 270 W microwave power level. © 2020 Namik Kemal University - Agricultural Faculty. All rights reserved.