Salīdzināt metodes

	Penmana-Montīta vienādojums	Augsnes elpošanas mērīšana
Nozare	Agronomija	Agronomija
Saime	Process / pipeline	Process / pipeline
Izcelsmes gads	1948-1965	Mid-20th century (chamber methods formalised ~1950s–1970s; automated systems ~1990s)
Autors	Howard Latimer Penman, John Monteith	Multiple contributors
Tips	Mechanistic evapotranspiration model	Field measurement technique
Pirmavots	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.
Citi nosaukumi	PM Equation, FAO-56 PM, Evapotranspiration Model	soil CO2 efflux measurement, soil carbon flux measurement, belowground respiration measurement, soil surface CO2 flux measurement
Saistītās	3	1
Kopsavilkums	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.