2017
DOI: 10.1071/sr15305
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Effects of tillage on the soil water retention curve during a fallow period of a semiarid dryland

Abstract: Tillage practices have a significant influence on the soil hydro-physical properties. The objective of this work was to evaluate the effect of tillage on the α (a scaling factor) and n (a pore size distribution parameter) van Genuchten soil water retention curve parameters during an 18-month long fallow period in a semiarid dryland. Three different tillage systems employed during 23 years of trials were compared: conventional (CT), reduced (RT) and no-tillage (NT). Measurements of soil bulk density (ρb) and th… Show more

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Cited by 32 publications
(23 citation statements)
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“…Soil water retention characteristics at large and small soil water matric potentials were shown to have opposite responses to changes of ρ b induced by traffic compaction or tillage operations (Osunbitan et al, ; Richard et al, ; Strudley et al, ). Smaller soil water contents were observed in soil samples with larger ρ b at relatively large values of matric potential, but an opposite trend was observed at relatively small values of matric potential (Osunbitan et al, ; Peña‐Sancho et al, ). The slope of the soil water retention curve (WRC) was also found to be significantly influenced by ρ b (Dexter, ).…”
Section: Introductionmentioning
confidence: 97%
“…Soil water retention characteristics at large and small soil water matric potentials were shown to have opposite responses to changes of ρ b induced by traffic compaction or tillage operations (Osunbitan et al, ; Richard et al, ; Strudley et al, ). Smaller soil water contents were observed in soil samples with larger ρ b at relatively large values of matric potential, but an opposite trend was observed at relatively small values of matric potential (Osunbitan et al, ; Peña‐Sancho et al, ). The slope of the soil water retention curve (WRC) was also found to be significantly influenced by ρ b (Dexter, ).…”
Section: Introductionmentioning
confidence: 97%
“…Clásicamente, la DTPo es obtenida de la curva de retención hídrica (CRH) del suelo, que es definida como la relación entre el contenido de humedad volumétrico del suelo (θ) y el potencial agua del suelo (h). Esta función del suelo, junto con la función K (h), es una de las principales propiedades que determinan el flujo de agua en la zona no saturada del suelo (Moret-Fernández et al, 2017). Como ya fue mencionado en el apartado 1.2.2, una de las funciones más comunes que describen la CRH es la ecuación de van Genuchten (1980), en la cual θ es relacionada con h a través de una ecuación empírica, con tres parámetros de ajustes: m, n y α. Algunos autores han encontrado que suelos bajo SD mostraron una reducción más gradual del contenido hídrico a medida que la tensión se incrementaba, en comparación con LC (Evett et al, 1999, Schwartz et al, 2003, Peña-Sancho et al, 2017.…”
Section: Movimiento De Solutos En El Suelounclassified
“…(Schwen et al, 2011a, Jirku et al, 2013. Los mayores valores de θma encontrados bajo LC, especialmente luego de realizada la labor, indicaría que el efecto de la labranza solo es temporal y que los procesos posteriores como las lluvias y los ciclos de humedecimiento-secado producen una reconsolidación del suelo (Strudley et al, 2008, Peña-Sancho et al, 2017. Daraghmeh et al (2008) mencionan que en suelos arenosos, la macroporosidad generada por la labranza es inestable y decrece fuertemente durante el ciclo de cultivo.…”
Section: Análisis Estadísticounclassified
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