Download Physiological Plant Ecology I: Responses to the Physical by O. L. Lange, P. S. Nobel, C. B. Osmond, H. Ziegler PDF

By O. L. Lange, P. S. Nobel, C. B. Osmond, H. Ziegler

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Extra resources for Physiological Plant Ecology I: Responses to the Physical Environment

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They will be used in the energy budget analyses to be presented in the next section. They should not in most cases be considered adequate substitutes for measured radiant fluxes, as is perhaps obvious from the number of assumptions needed to simplify some of the equations to manageable proportions. This being the case, instruments and techniques for measuring radiant fluxes in the plant environment should be mentioned briefly. Short-wave fluxes are easily measured with a pyranometer (COULSON 1975).

5. Latent heat loss from a leaf as a function of wind speed and stomatal resistance showing that increasing wind can either increase or decrease transpiration =100 N E ..... ~ ~ 200 .. J x" :i ~ 100 -----------________~5~0~0_ __ "----__________~I~O~OO~___ 2 3 4 5 Wind Speed - m/s either increase or decrease transpiration, depending on environment and leaf properties. 5 shows this for a "typical" leaf. When rvs is low, increasing wind decreases boundary layer resistance and increases transpiration [Eq.

American Society of Agricultural Engineers, St. Joseph, Mich. Norman JM (1980) Interfacing leaf and canopy light interception models. S. CAMPBELL: 1 Fundamentals of Radiation and Temperature Relations JD (ed) Predicting photosynthate production and use for ecosystem models Vol. 2. ] V. Radiation penetration theory and a test case. J Appl Ecol 12: 839-878 Norman JM, Welles JM (1981) Radiative transfer in an array of canopies. Agron J Paltridge GW, Platt CMR (1976) Radiative processes in meteorology and climatology.

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