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Comparison of simulated and actual evaporation from maize and soil in a lysimeter

โœ Scribed by Paul E. Waggoner; Neil C. Turner

Publisher
Elsevier Science
Year
1972
Weight
501 KB
Volume
10
Category
Article
ISSN
0002-1571

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โœฆ Synopsis

Evaporation from maize and soil in a pair of lysimeters in a maize crop, ventilation and net radiation above the crop canopy, temperature and humidity above and below the canopy, and leaf area and stomatal resistance in six strata of the canopy were observed during 12 one-hour periods. The measured evaporation was mimicked by an algebraic simulator of energy exchange in six canopy strata plus a seventh stratum occupied by bare stems and the soil surface when the observed stomatal resistance or a resistance that varied realistically with radiation was specified. If a constant stomatal resistance was specified, the simulation was inaccurate. Accurate simulation of evaporation from the soil required that diffusivity be decreased more rapidly within the lower canopy than the observed decrease in horizontal wind.

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