Comparer des méthodes

	Courbe de teneur en eau du sol	Équation de Penman-Monteith	Mesure de la respiration du sol
Domaine	Agronomie	Agronomie	Agronomie
Famille	Process / pipeline	Process / pipeline	Process / pipeline
Année d'origine	1956-1980	1948-1965	Mid-20th century (chamber methods formalised ~1950s–1970s; automated systems ~1990s)
Auteur d'origine	Willard Robert Gardner, Rollin H. Brooks, Arthur T. Corey	Howard Latimer Penman, John Monteith	Multiple contributors
Type	Empirical soil water retention model	Mechanistic evapotranspiration model	Field measurement technique
Source fondatrice	Gardner, W. R. (1956). Representation of soil aggregate-size distribution by a logarithmic-normal distribution. Soil Science Society of America Journal, 20(2), 151-153.	Penman, H. L. (1948). Natural evaporation from open water, bare soil and grass. Proceedings of the Royal Society A, 193(1032), 120-145.	Hanson, P. J., Edwards, N. T., Garten, C. T., & Andrews, J. A. (2000). Separating root and soil microbial contributions to soil respiration: A review of methods and observations. Biogeochemistry, 48(1), 115–146.
Alias	Water Retention Curve, pF Curve, Characteristic Curve, SWRC	PM Equation, FAO-56 PM, Evapotranspiration Model	soil CO2 efflux measurement, soil carbon flux measurement, belowground respiration measurement, soil surface CO2 flux measurement
Apparentées	3	3	1
Résumé	The soil moisture curve (or soil water retention curve, SWRC) describes the relationship between soil water content and soil matric potential (water tension). It characterizes how tightly water is bound in pores of different sizes: large pores drain at low tensions (wet soils), while smaller pores retain water at high tensions (dry soils). Quantifying this relationship is essential for water balance modeling, unsaturated flow prediction, and assessing plant-available water.	The Penman-Monteith equation is a mechanistic model for estimating evapotranspiration (ET), the combined loss of water from soil and plant canopies to the atmosphere. First proposed by Penman (1948) for bare soil and water surfaces, then extended by Monteith (1965) to incorporate plant resistance to water vapor diffusion, it has become the international standard for water balance studies, crop water requirement calculation, and hydrological modeling.	Soil respiration measurement quantifies the rate at which CO2 is released from the soil surface to the atmosphere, integrating contributions from root respiration and microbial decomposition of organic matter. It is a fundamental technique in agronomy, ecology, and climate science, providing insight into belowground carbon cycling, soil biological activity, and ecosystem carbon balance. Measurements are typically made using static or dynamic chambers placed on the soil surface.