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Economics Only. Applying More Means Less.
“So you are an economist first and an agronomist second”
“You better bet
different. The Engineers have figured it out.”
This is Kevin Medow at Seward,
Compare number 3 and number 4 test plots. Bert Bock design.
Randomized and replicated on 2.1 acres in 30 total plots.
Dr. Schepers, Dr. Bock, Dr.
Frances, Dr. Fairweather and ASABE
Highest quality test plots in Nebraska. Fall banding.
The best plot was most likely in the 120 to 130 lb. N as NH3 per
lbs. N rate per acre application
is inclusive of the 13.26 lbs. N/A from 9.15 gallons of 10-34-0.
So, the NH3 rate was 131.74 lbs. N per acre
of the 145 lbs. per acre rate of N.
previous test plot years, we had reached 250 lbs. N per acre in
plots….and that was an economic waste.
Yields do go down as the producer applies
more above 170 lbs. N per acre at TAPPKTS plus Zinc.
Production at Beemer, Engelmeyer
Broadcast, Mustard Interseeding in a Relay of Corn, Cotton or
Soybean. - Broadcast_08_10_2022 (exactrix.com)
At 140 lbs N as NH3
per acre on manured soils with no 10-34-0 and 3.5% OM.
At West Point,
Beemer, NE, We discovered in October of 2022 that including KTS
helped yields in fall banding.
Mustard…. In 2022 crop year we can reach yields of 315 bushel per
acre and average of the pivot at 299 bushels if we include fumigant
Mustard at 140 lbs. N per acre.
comes in at .46 lbs. of N per bushel of Pacific Gold Fumigant
mustard relay corn.
The crop was on
soybeans with relay Pacific Gold Fumigant Mustard. We are pretty
certain the Mustard brought another 30 bushels comparing to Non
Seeded areas of the pivot.
Ice age solution. Youngster Soils vs. Deep Soils
Site Specific Prescriptions should never go above 140 lbs. per acre
N as NH3 and total N can be held to 140 lbs. N. Raising total N
higher and higher makes no economic sense with 1% CV of application
using Mass Meters.
prescription writer must keep this in mind with Exactrix 1% CV
application. The writer can reduce NH3 to 120 lbs. N per acre if the
ATS and APP supplied ammonium N is 20 lbs. N per acre. Yields keep
going up if you identify the problem of non-uniform
Most often low
yielding areas of the field can be masked by high rates of Nitrogen
which hide B, Mn, Zinc, Iron needs. The real problems is low
yielding areas is not Nitrogen 95% of the time. It could be K or S.
The low yielding areas have physical problems such as compaction.
Sandy soils would have nematode problems most likely from
overapplication of N.
properly more investigation will help. The answer is is most likely
micro nutrients on higher elevation (1,800 ft to 5,200 feet) Great
Plains soil types. The youngster soils and sandy soils need to be
included into the total need of the plant.
It may take 2
crops of corn to fine tune tissue samples. Tissue samples at tassel
or R-1 stage should be used to help figure out micro nutrient
shortages that are occurring due to the last Ice Age leaving later
than the lower elevation soils.
method in VRT prescription writing is to stop all N application at
120 to 140 lbs. N. Then get started with an economic method of no
more than 12% of the gross income investigation of N, P, K, S and
Soil pH which is optimized at 6.8 in Iowa Conditions….but not Kansas
conditions which is 7.4 pH is optimum.
ammonia is becoming less expensive due to the 10X growth in
availability producers can benefit.
Carbon, Green Play
at $242 per ton.....locally, Exactrix NH3 Is Different at 1% CV
Application Fall Banded.
145 pounds N is good enough. Applying More Means Less.
Irrigated Corn Yields in the 350 bushel per acre range are achieved
with Exactrix at 140 lbs. N as NH3 per acre total.
today banding deep and running fast in No-tillage.
In 2025 N will
cost in Zero Carbon, 14.72 cents per lb.
That is $20.66
As compared to
2022 at upwards of $250 per acre.
That is $230
per acre in management savings risk if you are a Green Player in
A note to Rick Engelmeyer at Beemer, NE following some top yields as
high as 292 bushel average for his brother.
Improving Yields at Beemer, Nebraska along the Lower Elkhorn River
Drainage. - Broadcast 01_18_2021 (exactrix.com)
You can improve your NH3 only application by adding a second
product. Place your bet on Thio-sul® with micros.
Addition of Thio-sul® at 7 gallons per acre is about 20 lbs. of
Sulfur. This could be a real nutrient need in a manure rotation
using soybeans and applying 140 lbs. of N to raise 275 bushel
corn, you may finally be able to break the 300 bushel per acre
average mark with TATS or Tri-ammonium Thio-Sulfate or Thiosul® and
These plots were very good (Low LSD at 2.5 acres each, 32 total) at
York, Kevin Medow, and deserve your attention, 11.0 bushels per
acre. With DCD added, 14.4 bushels per acre. The DCD is not worth it
as there a was dollar swap at $15 cost. You could try a $5.00 rate
of DCD and see where that goes.
You can also try KTS®, Potassium Thio-Sulfate, but I think low
cost Thio-Sul® is best, 7 gallons is about $15. That should get you
$38.50 per acre more gross at $3.50 and an additional net $23.50. It
is a very low risk adventure. You should pay for the equipment with
the first crop.
You can also add a metals package, Manganese for sure and a low
cost, Ammoniated Zinc and get the punch of micros that the manure
may not have due to lack of uniformity of application with manure
Combining Exactrix NH3 in Liquid streaming flows of liquid state
plant nutrients at high pressures assures high yields.
TAPPS is Tri-ammonium Poly Phosphate Sulfate, TATS is Tri-ammonium
Streaming flows are well published and discovered by the Tennessee
Valley Authority in the 60’s.
Exactrix® maintains the 1% CV, high uniformity of application
using Mass Flow meters.
Your Great Plains Reporter,
Guy J Swanson.
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