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

Molin, José Paulo; Faulin, Gustavo Di Chiacchio

Scientia Agricola; v. 70 n. 1 (2013); 01-05

Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz 2013-02-01

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  • Título:
    Spatial and temporal variability of soil electrical conductivity related to soil moisture
  • Autor: Molin, José Paulo; Faulin, Gustavo Di Chiacchio
  • Assuntos: Precision Agriculture; Soil Physics; Geostatistics; Soil Sensors
  • É parte de: Scientia Agricola; v. 70 n. 1 (2013); 01-05
  • Descrição: 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.
  • Títulos relacionados: https://www.revistas.usp.br/sa/article/view/52976/57032
  • Editor: Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz
  • Data de criação/publicação: 2013-02-01
  • Formato: Adobe PDF
  • Idioma: Inglês
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