Çaylı, Ali2020-06-042020-06-042020-07-01Ali Çaylı. "Temperature and Relative Humidity Spatial Variability: An Assessment of The Environmental Conditions Inside Greenhouses" Fresenius Environmental Bulletin Vol. 29 Iss. 7 (2020) p. 4954 - 4962 ISSN: 1018-46191018-4619/1610-2304http://works.bepress.com/alicayli/13/https://acikerisim.ksu.edu.tr/handle/ksu/356Environmental conditions are among the most important factors that affect plant growth, yield, and quality in greenhouse production. Heating and ventilation requirements can affect the uniform distribution of climatic factors within a greenhouse, such as the temperature and relative humidity, which can prevent plants from growing evenly. Furthermore, in addition to affecting plant growth, the temperature and humidity spatial variability play an important role in the development of various diseases. Modern technology has provided tools for determining the spatial differences in greenhouse climate and investigating their cause(s). This study was designed to investigate greenhouse climatic heterogeneity and its effect on plant growth. To this end, research was conducted from December to April in two different greenhouses— one covered with Polyethylene (PE), and the other with a double layer PE. Data loggers were located at six different points to measure the temperature and relative humidity values. The measurement data were classified as night, day, heating with, and heating without a thermal screen and were subsequently statistically compared. The measurements-based analysis demonstrated that the thermal uniformity was superior in a double layer covered greenhouse when compared to a single layer covered greenhouse and provided good insulation. In addition, the use of a thermal screen significantly contributed to climatic uniformity.engGreenhouses, Greenhouse climate, Thermal uniformity, Thermal environment, Greenhouse heatingArticle29749544962