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Prediction of volumetric water content in conservation agriculture
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Edité par CCSD -
International audience. The lack of accurate data on soil hydraulic properties limits the use of water and solute transport models as they require water retention and hydraulic conductivity data to be implemented. In order to manage this scarcity of data, pedotransfer functions (PTFs) can be used to predict hydraulic properties. PTFs relate easily available soil properties to properties more difficult to access such as hydraulic ones. It is recommended to restrict their application to dataset similar to the calibration dataset to prevent inaccurate results. Adding soil management data, such as tillage practices or more generally cropping system information has been proposed as a way to improve their accuracy. Indeed, despite significant differences in soil properties between tillage systems, most of the PTFs were established for conventionally tilled soils. With an arising concern of water management in soils, especially water retention and availability for crops, soil properties of conservation tillage systems have to be accurately estimated what could led to adaptation or development of PTFs.
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