Spatial and temporal variability of soil electrical conductivity related to soil moisture



Título del documento: Spatial and temporal variability of soil electrical conductivity related to soil moisture
Revista: Scientia agricola
Base de datos: PERIÓDICA
Número de sistema: 000354697
ISSN: 0103-9016
Autors: 1
Institucions: 1Universidade de Sao Paulo, Escola Superior de Agricultura "Luiz de Queiroz", Piracicaba, Sao Paulo. Brasil
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Període: Ene-Feb
Volum: 70
Número: 1
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental, analítico
Resumen en inglés 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
Disciplines Agrociencias
Paraules clau: Suelos,
Variabilidad espacial,
Variación temporal,
Conductividad eléctrica,
Humedad del suelo,
Propiedades físicas,
Geoestadística,
Sensores
Keyword: Agricultural sciences,
Soils,
Spatial variability,
Temporal variation,
Electrical conductivity,
Soil moisture,
Geostatistics,
Sensors
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