Soil moisture distribution mapping in topsoil and its effect on maize yield
2017
Milics, Gábor | Kovács, Attila J. | Pörneczi, Attila | Nyéki, Anikó | Varga, Zoltan | Nagy, Viliam | Lichner, Ľubomír | Németh, Tamás | Baranyai, Gábor | Neményi, Miklós
Soil moisture content directly influences yield. Mapping within field soil moisture content differences provides information for agricultural management practices. In this study we aimed to find a cost-effective method for mapping within field soil moisture content differences. Spatial coverage of the field sampling or TDR method is still not dense enough for site-specific soil management. Soil moisture content can be calculated by measuring the apparent soil electrical conductivity (ECₐ) using the Veris Soil EC-3100 on-the-go soil mapping tool. ECₐ is temperature dependent; therefore values collected in different circumstances were standardized to 25°C temperature (EC₂₅). Constants for Archie’s adjusted law were calculated separately, using soil temperature data. According to our results, volumetric moisture content can be mapped by applying ECₐ measurements in our particular field with high spatial accuracy. Even though within-field differences occure in the raw ECₐ map standardization to EC₂₅ is recommended. Soil moisture map was also compared to yield map showing correlation (R² = 0.5947) between the two datasets.
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