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Photosynthesis Under Field Conditions. VII. Radiant Energy Exchanges Within a Corn Crop Canopy and Implications in Water Use Efficiency 1
Author(s) -
Allen L. H.,
Yocum C. S.,
Lemon E. R.
Publication year - 1964
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/agronj1964.00021962005600030002x
Subject(s) - canopy , environmental science , shortwave radiation , leaf area index , shortwave , crop , agronomy , radiant energy , radiation , atmospheric sciences , radiative transfer , physics , biology , botany , optics
Synopsis Data are assembled giving sinks of shortwave radiation within a corn crop canopy. From these data, and from net radiation measurements obtained at 225‐, 175‐, 100‐, and 20‐cm. heights within a crop of corn 300 cm. high, net thermal radiation is calculated at those respective heights. Transmission data at those heights, using a Miller field light transmission photometer, indicate that shortwave transmission can be expressed as an exponential function of height as well as of cumulative leaf area index.