Plant Canopy Analysis. Gaylon S. Campbell, Ph.D. Decagon Devices and Washington State University. Radiant energy and plant canopy analysis. Why do we care about the radiation environment of plant canopies? Calculate Leaf Area Index (LAI) Crop growth stage Ecosystem health
Gaylon S. Campbell, Ph.D.
Decagon Devices and Washington State University
Leaf with area = a
Unit ground Area
(onions < 1)
(strawberries χ= 3)
What does G do for us?
- allows us to relate τto LAI for any canopy, given c
Decagon Accupar LP-80
t ~ 0.05
t ~ 0.7
t = 1.00
Φbc = average radiant flux density below canopy
ST avg = average total radiation above canopy
LAI from fisheye photo(method 2: use solver in excel)