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Wind Structure above and within a Soybean Canopy 1
Author(s) -
Perrier E. R.,
Millington R. J.,
Peters D. B.,
Luxmoore R. J.
Publication year - 1970
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/agronj1970.00021962006200050018x
Subject(s) - canopy , anemometer , turbulence , atmospheric sciences , environmental science , wind speed , standard deviation , meteorology , mathematics , physics , botany , biology , statistics
The turbulent structure of wind within and above a soybean canopy was studied utilizing observations of wind speed, standard deviation, and frequency distributions. Within the validity of the one‐dimensional logarithmic profile relation .(above the soybean canopy) the transfer coefficient and mixing length are calculated. The data indicate that the fluid motion within the soybean canopy is aerodynamically different from the turbulent air layer above the plant canopy, which suggests a two‐dimensional flow cavity. The skewed frequency distribution and high standard deviations within the soybean canopy suggest difficulty in describing the vector direction and gradient relations using data collected from anemometers which measure all wind components in the horizontal plane.