Spatial and temporal variability of soil electrical conductivity related to soil moisture
DOI:
https://doi.org/10.1590/S0103-90162013000100001Palavras-chave:
precision agriculture, soil physics, geostatistics, soil sensorsResumo
Soil electrical conductivity (ECa) is a soil quality indicator associated to attributes interesting to site-specific soil management such as soil moisture and texture. Soil ECa provides information that helps guide soil management decisions, so we performed spatial evaluation of soil moisture in two experimental fields in two consecutive years and modeled its influence on soil ECa. Soil ECa, moisture and clay content were evaluated by statistical, geostatistical and regression analyses. Semivariogram models, adjusted for soil moisture, had strong spatial dependence, but the relationship between soil moisture and soil ECa was obtained only in one of the experimental fields, where soil moisture and clay content range was higher. In this same field, coefficients of determinations between soil moisture and clay content were above 0.70. In the second field, the low soil moisture and clay content range explain the absence of a relationship between soil ECa and soil moisture. Data repetition over the years, suggested that ECa is a qualitative indicator in areas with high spatial variability in soil texture.Downloads
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Publicado
2013-02-01
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Construções Rurais
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Todo o conteúdo do periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons do tipo atribuição BY-NC.Como Citar
Spatial and temporal variability of soil electrical conductivity related to soil moisture . (2013). Scientia Agricola, 70(1), 01-05. https://doi.org/10.1590/S0103-90162013000100001