June 2021 - 22

STRUCTURES & EQUIPMENT
BY DAVID KUACK
R
egardless of the crop you are growing,
providing the proper environmental
conditions are critical to ensuring
plants reach their optimal potential.
" The first thing growers need to consider
when determining what type of environmental
control system to install is the crops they are
growing, " says Murat Kacira, director of the
Controlled Environment Agriculture Center at
the University of Arizona. " Whether growing
vegetables, ornamentals or a medicinal
crop, growers need to consider what they
are producing. Growers need to be aware of
the crops' requirements or expectations in
terms of the environment needed so they can
achieve the optimum growing potential of
their crops.
" The crop will determine the temperature,
humidity, light levels (intensity and spectrum)
and carbon dioxide enrichment. The crop also
impacts related processes including the water
source and availability. Knowing the plants'
water needs and how that water is going to
be delivered also impacts the environment.
Growers can use a variety of water delivery
methods to irrigate their plants which
transpire and contribute to the humidity in
the greenhouse. This requires an additional
consideration for managing the environment
in terms of humidity. "
CROP EXPECTATIONS
The yield and quality expectations
Choosing the Right
ENVIRONMENTAL
CONTROL SYSTEM
When selecting a control system for controlled environment
production you need to match environmental control to the
crop, climate and structure.
22 JUNE 2021 GPNMAG.COM
of buyers and/or consumers need to
be considered when selecting crop
production technology along with a suitable
environmental control system.
" If the end consumer is looking for a
high-quality, high-yield product, growers
need to match and integrate production
system technology with the environmental
control system, " Kacira says. " This will
enable growers to maintain the environment
demanded by their crops for optimal
production along with efficient use of
resources. For food crops, growers are
looking for certain yields, but also have to
consider flavor, texture and appearance.
This also applies to ornamentals and
medicinal crops. Growers can control the
quality characteristics by controlling the
environment. How tightly the environment
is controlled and the flexibility that growers
have with that control really depends on the
final objectives.
When managing the environment, growers need
to consider how different irrigation methods can
contribute to the humidity in a greenhouse.

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June 2021

Table of Contents for the Digital Edition of June 2021

June 2021 - 1
June 2021 - 2
June 2021 - 3
June 2021 - 4
June 2021 - 5
June 2021 - 6
June 2021 - 7
June 2021 - 8
June 2021 - 9
June 2021 - 10
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