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Relationships between air relative humidity and soil temperature in open-field tomato production

dc.contributor.authorDallev, M.
dc.contributor.authorHristova, G.
dc.date.accessioned2026-08-26T06:38:04Z
dc.date.available2026-08-26T06:38:04Z
dc.date.issued2026
dc.descriptionReceived: April 9th, 2026 ; Accepted: July 22nd, 2026 ; Published: August 17th, 2026 ; Correspondence: galina_jam@yahoo.comeng
dc.description.abstractUnderstanding microclimatic interactions between atmospheric and soil parameters is essential for precision agriculture and irrigation management. The present study evaluated the relationships between air temperature, relative humidity, soil temperature, and soil moisture under open-field tomato production using a portable ESP32-based monitoring system. Measurements were conducted at ten field points with three replicates per point (n = 30). Descriptive statistics indicated relatively stable environmental conditions during the observation period. Pearson correlation analysis revealed a statistically significant inverse relationship between air relative humidity and soil temperature (r = -0.376, p = 0.040), while no significant linear relationships were observed between the remaining variables (p > 0.05). Linear regression analysis confirmed that increasing air relative humidity was associated with decreasing soil temperature (R² = 0.142, p = 0.040), although the explanatory power of the model remained limited. Validation against a Meteobot® reference weather station demonstrated high accuracy of soil temperature measurements (relative error 0.74%) and acceptable performance for soil moisture (6.28%). The results indicate that low-cost IoT-based monitoring systems can reliably capture microclimatic interactions under field conditions and support their application in precision agriculture.eng
dc.identifier.citationDallev, M., & Hristova, G. (2026). Relationships between air relative humidity and soil temperature in open-field tomato production. Estonian University of Life Sciences. https://doi.org/10.15159/AR.26.059en
dc.identifier.issn2228-4907
dc.identifier.publicationAgronomy Research, 2026, vol. 24, no. 3, pp. 31–41eng
dc.identifier.urihttp://hdl.handle.net/10492/10990
dc.identifier.urihttps://doi.org/10.15159/ar.26.059
dc.publisherEstonian University of Life Scienceseng
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)eng
dc.rightsinfo:eu-repo/semantics/openAccesseng
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectair humidityeng
dc.subjectmicroclimate monitoringeng
dc.subjectprecision agricultureeng
dc.subjectregression analysiseng
dc.subjectsoil temperatureeng
dc.subjectarticleseng
dc.titleRelationships between air relative humidity and soil temperature in open-field tomato productioneng
dc.typeArticleeng

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