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Photosynthesis Under Field Conditions. II. An Aerodynamic Method for Determining the Turbulent Carbon Dioxide Exchange Between the Atmosphere and a Corn Field 1
Author(s) -
Lemon Edgar R.
Publication year - 1960
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1960.00021962005200120009x
Subject(s) - turbulence , carbon dioxide , atmosphere (unit) , aerodynamics , atmospheric sciences , environmental science , limiting , crop , agronomy , photosynthesis , wind speed , meteorology , physics , chemistry , mechanics , botany , biology , mechanical engineering , engineering , organic chemistry
Synopsis Rates of exchange calculated from measurements of wind velocity and CO 2 gradients in the turbulent air stream were in the same order of magnitude as those calculated by another method and the aerodynamic method does not alter the crop environment. Turbulence may be a limiting factor in supply of CO 2 to an active crop on sunny days. Photosynthesis efficiency was 5% at midday and nearly 8% for total daylight period on a single day.