Biyosistem Mühendisliği Bölümü

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Browsing Biyosistem Mühendisliği Bölümü by Author "Baytorun, A. Nafi"

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    An Investigation of Temporal Variability of Heat Requirements for Greenhouse Tomato Production in Turkey’s Mediterranean Region
    (Parlar Scientific Publications (P S P), Angerstr. 12, Freising, Germany, 85354, 2020-06-01) Çaylı, Ali; Baytorun, A. Nafi; Akyüz, Adil; Üstün, Sait
    Turkey’s Mediterranean region is part of an important industry for the greenhouse production of tomatoes. Due to climatic conditions, green-houses in this region require heating on cold winter nights for sufficient, high-quality yields. In terms of production costs, heating costs make up 20% of total expenses, and can be seen as an important input item. Therefore, in order to assess the con-struction and production costs in the planning and production stages, it is beneficial to know the heat-ing expenses. By knowing the required heat energy, it is possible to choose the appropriate power and heating systems, and to evaluate the competition and market conditions on a broader scale. In addi-tion, various studies have shown that global climate change affects agricultural production in many ways, particularly because production areas and types of cultivated product may vary regionally For this study, we focused on the impact of global climate change on greenhouse heat require-ments in Turkey’s Mediterranean region, in which greenhouse tomato cultivation is common. Using the official station data from 1985-2018, and a model that is presented in this study, we calculated the hourly heat requirements from two periods—1985-2004 and 2005-2018—and compared the data. The results showed that there was a 12–25% reduction in greenhouse heat requirements between the two selected periods.
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    Analysis of Climate and Vapor Pressure Deficit (VPD) In a Heated Multi-Span Plastic Greenhouse
    (Journal of Animal & Plant Sciences, 2021-12-01) Çaylı, Ali; Baytorun, A. Nafi
    One of the most common problems encountered in greenhouse production, i.e., high humidity, provides a favorable environment for the development of various diseases, thereby leading to significant reduction in product quality and quantity. The humidity in a greenhouse for plant growth is expressed via the vapor pressure deficit (VPD), which is an important indicator of the temperature-dependent moisture content of air. In this study, changes in the temperature-dependent relative humidity (RH) and VPD were investigated for a heated greenhouse growing different plants where is located in the Cevdetiye district of Osmaniye province in the Eastern Mediterranean Region in Turkey. For this purpose, VPD values were calculated by measuring the temperature and RH above and below the thermal screen in each compartment of the greenhouse for two months from December 2018 to January 2019, and the relationships between other climate parameters were determined using regression models. The findings revealed significant differences (P <0.01) between the day and night values in all compartments. Pepper, eggplant-cucumber, and tomatoes were grown in three separate greenhouse compartments with the same structural characteristics and heating at night. The number of VPD values lower than the comfort limit was compared with the total number of measurements that were performed hourly. Values of 4.4%, 43.5%, and 36.8% (nighttime) and 3.4%, 23.6%, and 27.3% (daytime) were obtained for the greenhouses containing pepper, eggplant-cucumber, and tomatoes, respectively.
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    The Feasibility of a Cloud-Based Low-Cost Environmental Monitoring System Via Open Source Hardware in Greenhouses
    (Kahramanmaraş Sütçü İmam Üniversitesi, 2018-06) Çaylı, Ali; Akyüz, Adil; Baytorun, A. Nafi; Üstün, Sait; Mercanlı, Ali Selçuk; Kahramanmaraş Sütçü İmam Üniversitesi
    One of the most critical parameters in agricultural production is environmental conditions. It is of vital importance to ensure and monitor suitable climatic conditions for various controlled agricultural structures and production systems such as greenhouses. To this aim, most data monitoring systems cannot be efficiently used due to high cost and insufficient technical knowledge. It is possible to design low-cost and scalable monitoring, control and data acquisition systems via open source hardware in order to monitor climatic data for agricultural practices in small enterprises and rural areas. In this study, a low-cost system designed via open source hardware was tested under real conditions. Temperature and relative humidity were measured via the sensors in the system and sent to a data server through a wireless network. In addition, collected data was compared to reference devices for statistical analysis. The results suggest that these low-cost systems, which are designed via open source hardware, can be used as a data collection and decision support system by agricultural enterprises.