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ABSORPTION FACTOR
Figure 3 Absorption versus distance. Greenhouse, Buster, Tumbler-Snapper, and Ivy.
Blue-senaitive photocell (generally Type 929, except Greenhouse used Type 5819). Where
noted, R, red-sensitive (Type 925) was used. Absorption factor determined from meas)« Value plotted is effective eXD,
ured irradiance at observing station and: Wp *(WT/41D? e”
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