Spudman March 2023 - 27

that nitrogen is converted, the plants
are inedible to these sucking and
chewing insects, said Tulley.
Tulley has seen reduced N in a field
yield amazing results, sometimes
with half or less than half of
traditional recommendations. When
used in combination with applied
micronutrients, insect infestations and
the need for pesticides were reduced.
" There can be pests all around, and
in all the pivots, but no pests in these
fields. It's shocking, " he said.
Sap analysis has been available for
a number of years, but it's still new
enough to the industry that it isn't
standard practice. It is, however, gaining
traction as a more accurate method
to determine the needs of the plant.
Tissue analysis is still the norm, but in
comparison, it paints a more historical
view of what's been nutritionally built
into the leaf prior, in addition to what's
currently present.
A sap analysis is more akin to a blood
test, providing a view of what's running
One farmer near Moses Lake, Washington, tried
a protocol with reduced nitrogen, increased
biology and increased calcium. The percentage
of bruise-free potatoes climbed well over
90%. It was the best percentage the farm had
experienced, and remains consistent to this day.
through the plant now, with an up-todate,
real-time data point.
" We use sap analysis to realistically
determine what sort of nitrogen
applications are needed, because it's
going to be different from field to field
and crop to crop, " Tulley said. " There
isn't a magic number of what the right
amount of nitrogen is. We test, the
plants tell us, and we go from there. "
Another significant piece of this
puzzle are the micronutrients used to
process the nitrate and ammonium into
proteins, and sap analysis is also used
to determine which micronutrients are
missing so they can be supplied.
CHANGING THE TRADITION
Reevaluating historical practices can
have a positive effect for growers.
Take, for example, pesticide sprays. If
growers have the resources, it's better
to spray reactively based on scouting
rather than prophylactically based on
the calendar, said Tulley.
So, what would a season look like? A
biological application would follow a
fall fumigation to reestablish biology.
Spudman.com 27

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Spudman March 2023

Table of Contents for the Digital Edition of Spudman March 2023

Spudman March 2023 - 1
Spudman March 2023 - 1A
Spudman March 2023 - 2A
Spudman March 2023 - 2
Spudman March 2023 - 3
Spudman March 2023 - 4
Spudman March 2023 - 5
Spudman March 2023 - 6
Spudman March 2023 - 7
Spudman March 2023 - 8
Spudman March 2023 - 9
Spudman March 2023 - 10
Spudman March 2023 - 11
Spudman March 2023 - 12
Spudman March 2023 - 13
Spudman March 2023 - 14
Spudman March 2023 - 15
Spudman March 2023 - 16
Spudman March 2023 - 17
Spudman March 2023 - 18
Spudman March 2023 - 19
Spudman March 2023 - 20
Spudman March 2023 - 21
Spudman March 2023 - 22
Spudman March 2023 - 23
Spudman March 2023 - 24
Spudman March 2023 - 25
Spudman March 2023 - 26
Spudman March 2023 - 27
Spudman March 2023 - 28
Spudman March 2023 - 29
Spudman March 2023 - 30
Spudman March 2023 - 31
Spudman March 2023 - 32
Spudman March 2023 - 33
Spudman March 2023 - 34
Spudman March 2023 - 35
Spudman March 2023 - 36
Spudman March 2023 - 37
Spudman March 2023 - 38
Spudman March 2023 - 39
Spudman March 2023 - 40
Spudman March 2023 - 41
Spudman March 2023 - 42
Spudman March 2023 - 43
Spudman March 2023 - 44
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https://www.nxtbook.com/greatamericanmediaservices/SPUD/spudman-january-2023
https://www.nxtbook.com/greatamericanmediaservices/SPUD/spudman-november-december-2022
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https://www.nxtbook.com/greatamericanmediaservices/SPUD/march-2022
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https://www.nxtbook.com/greatamericanmediaservices/SPUD/january-2022
https://www.nxtbook.com/greatamericanmediaservices/SPUD/november-december-2021
https://www.nxtbook.com/greatamericanmediaservices/SPUD/september-october-2021
https://www.nxtbook.com/greatamericanmediaservices/SPUD/july-august-2021
https://www.nxtbook.com/greatamericanmediaservices/SPUD/may-june-2021
https://www.nxtbook.com/greatamericanmediaservices/SPUD/april-2021
https://www.nxtbook.com/greatamericanmediaservices/SPUD/march-2021
https://www.nxtbook.com/greatamericanmediaservices/SPUD/february-2021
https://www.nxtbook.com/greatamericanmediaservices/SPUD/january-2021
https://www.nxtbook.com/greatamericanmediaservices/SPUD/november-december-2020
https://www.nxtbook.com/greatamericanmediaservices/SPUD/september-october-2020
https://www.nxtbook.com/greatamericanmediaservices/SPUD/july-august-2020
https://www.nxtbook.com/greatamericanmediaservices/SPUD/may-june-2020
https://www.nxtbook.com/greatamericanmediaservices/SPUD/april-2020
https://www.nxtbook.com/greatamericanmediaservices/SPUD/march-2020
https://www.nxtbook.com/greatamericanmediaservices/SPUD/february-2020
https://www.nxtbook.com/greatamericanmediaservices/SPUD/january-2020
https://www.nxtbook.com/greatamericanmediaservices/SPUD/november-december-2019
https://www.nxtbook.com/greatamericanmediaservices/SPUD/september-october-2019
https://www.nxtbook.com/greatamericanmediaservices/SPUD/july-august-2019
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https://www.nxtbook.com/greatamericanmediaservices/SPUD/march-2019
https://www.nxtbook.com/greatamericanmediaservices/SPUD/february-2019
https://www.nxtbook.com/greatamericanmediaservices/SPUD/basf-2019
https://www.nxtbook.com/greatamericanmediaservices/SPUD/january-2019
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