February 2023 - 21

PRODUCTION
must be stored to have enough. " We choose to store
40,000 gallons of water and draw from that storage,
allowing the RO system to run 24 hours a day to keep the
tanks full. Growers draw down from the tanks during the
day, and they're replenished each night.
" After implementing this storage plan, we learned
that we had to treat the storage water to prevent algae
or biofilm from growing in our tanks, which led to the
installation of a chlorine dioxide injection system. This new
system is effective but requires regular testing to ensure
smooth operation, " DeBerti says.
During the RO process, one of the hardest elements
on the system filters is iron. " Since we had high levels
of iron in our water, we also had to install a potassium
permanganate filter to treat the water before it enters the
RO filters, " DeBerti says. This system removes the iron
from the water before it enters the RO, adding another
piece to be monitored during the process.
Mast Young Plants' RO system is effective for plant
growth but must be managed regularly by DeBerti. These
tasks include:
* Water testing from the well twice a year, in early
spring and late fall.
* Alkalinity testing at least once a week, with
maintenance at 80 to 120 ppm by blending back 10 to
20% raw water.
* Chlorine dioxide is applied to the water at a rate of
0.75 to 1.5 ppm, depending on the crop being grown.
Outside production with drip tape irrigation increases
the rate to 1.5 to 2 ppm.
* Backflushing the potassium permanganate filters
happens daily when water demand is at its lowest
because it can take up to four hours.
OTHER FACTORS TO CONSIDER
Nutrient levels should not be ignored. Certain
elements can be below recommended ranges and can be
supplemented with fertilizer changes, while other elements
like boron can be toxic at high levels.
" We have worked with some growers to get fertilizers
manufactured without boron incorporated to help offset
their water levels. It's important to address any issues
that are outside of normal range with experts to prevent
costly challenges, " Bourdon says. " Unfortunately, some
of these fixes can be expensive, but so can be not
addressing them. "
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GREENHOUSE PRODUCT NEWS 21
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February 2023

Table of Contents for the Digital Edition of February 2023
