Agriculture Reference
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Covering film
a
Droplet
T
Covering film
Droplet
a
T
Covering film
Droplet
a
T
Fig. 4.7. The optical behaviour of the light rays when crossing a water droplet condensed on the inner
surface of a greenhouse covering film depends on the angle (a) of contact of the droplet with the covering
material; T is the tangent to the droplet at the contact point (adapted from Díaz et al ., 2001).
has a great adhesion for dust, which is
avoided by using these additives only on
the internal surface of multilayer films
additives usually lasts less than the lifespan
of the film.
The condensation of water on the plas-
 
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