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Relay Intercrop, Yockey |
Tri-ammonium poly phosphate
sulfate is TAPPS.....or NH3, APP, and ATS.
Exactrix Nutrient
Uniformity Test plots in Kansas and Nebraska were designed around the
Ortho ratio using TAPPS. The plots will be harvested in October, 2004.
The Ortho ratio, developed by
Chevron Chemical, Jim and Gordon Thorpe is a consistent performing
nutrient ratio for cereal grains. The ratio is 27-12-0-7S. The Ortho
ratio is a used at 5 different rates to confirm the point of diminishing
returns.
Crops raised on soils with
varying pH and low OM or varying OM respond to dual placement
techniques.
Band spacing of 15 inch or
less are required in most cropping systems..... . 10" and 7.5" band
spacings are acceptable and desirable especially in spring cropping
systems. Follow Exactrix Guidelines on Band Concentration when applying
the Ortho Ratio.
Bands of 15 inch or less
applied pre-plant to corn production result in applications just prior
to planting without burning corn and corn roots even in very high pH
soils. Nutrients should be timed to the cropping cycle. The longer
nutrients are in the soil the greater the risk becomes of utilizing the
nutrients. To obtain top yields always time the nutrients to just before
planting, planter applied or side dress.
This is not a new practice.
However, machinery often limits TAPPS applied use on 15 inch or less
band centers. Yield increases of 20% or greater are often achieved over
other types of techniques of nutrient application, timing, and
formulation.
VRT applications are now much
more efficient with the uniform application and timing of the three
materials. Low CV application is only possible with banded and placed
liquid NH3, APP and ATS.
Timing of nutrient application
to the crop planting or seeding is absolutely critical for top yields
and highest efficiency. In the case of winter wheat in the PNW it may
be more important to side dress the major application on NP and S to
early spring into the growing winter wheat using single disc openers.
About 70% of nutrients are consumed in the top 18 inches of soil.
Confirming, since timing is involved, application of TAPPS is a producer
driven system.
Nitrogen stabilization does
occur when Thio-Sul is present in the band. Sulfur adds value since
sulfur is now removed from the emissions of the coal fired power
generation plants. High sulfur soils also respond to Thio-Sul band
placement. Sulfur is critical for building protein in cereal grains.
Oil seed production requires
about twice as much S as other crops. In 2004 mustard production at
Aurora, Nebraska, oil content of 43% was achieved with norm being 38%
using Thio-Sul in the TAPPS band of NH3 and APP. Thio-Sul is providing
the necessary sulfur to produce high oil content.
In DNS Wheat production
following the Ortho Ratio, very high protein was achieved in the 15% to
16% range. The variety Express produced the highest yields. A deep
orange color was observed in the straw at harvest at Aurora, NE. Some of
the highest proteins in the nation were produced in irrigated systems.
Thio-Sul and side dress application of the nutrients produced this high
nutrient efficiency at Aurora, NE.
It is now possible to side
dress wheat using single disc openers that band the nutrients in the
root zone without crop damage and very little soil disturbance.
The longer the placed
nutrients are in the soil the greater the risk becomes of reducing
nutrient efficiency and lowering yield expectations.
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The Yield
Goal for the soybeans was set at 60 bushels per acre. Any
residual unused nutrients from the DNSW crop would be utilized
by the soybeans. The soybeans were in exceptional good shape as
they emerged from the canopy.
FHB reduced
overall wheat yields to the 41 bushel/A range for all three
varieties. Based on rod row samples yields were potentially
much higher (107 bu./A) even on wide 15" row spacing.
However,.. Protein reached rather lofty marks of 14.9% to 15.9%
and test weight came in at 59 pounds per bushel. Falling Numbers
test has not been implemented. The Express yielded about 30%
higher or approximately 60 bushels per acre with a 60%
infestation of FHB.
No Folicur
was applied to DNS Wheat since Nebraska growers do not have the
label....one of the few wheat producing states that does not
have the Section 18 label. Folicur must be applied with dual
nozzles tilted forward and backward applying at 45 psi to 90 psi.
Folicur applications are a suppression.....not a control.
Timing is critical at Feekes 10.51 or early bloom. Dual
applications at half rates should be considered since the onset
of bloom can vary. It is very important for the seeding to be
uniform seed depth with all plants emerging together to assure a
better timing event of the Folicur application.
Some rain did
fall on the DNSW during the critical bloom period.
Quilt was
applied at the full boot stage on 5/27/04. The application was
delayed 4 days due to weather.
The soybeans
were planted May 27-29 into the DNSW with a Deere planter, 3
point mounted.
Roundup was
applied prior to planting of DNSW in early March....no in crop
weed control was applied.
The Roundup
Harvest label was applied very timely. The rate was 40 ounces
per acre on July 11th. No sprout damage was observed. The
Roundup application was delayed 5 days because of rain. The
pictures show the end of harvest after the mature crop had
received one or two rainstorms of about 1/2" each. We think the
Roundup Harvest label may have reduced sprout in the head.
Harvest began July 19 to 21 followed by a rainy
period....and completion of harvest July 26. Harvest was about
10 days behind winter wheat harvest.
The timing of
nutrients applied side dress was very key in producing high
proteins. Proper irrigation also improved nutrient efficiency.
Over
irrigation was avoided to hold the nitrogen in the upper two
feet of soil. The placed N as NH3 remained ammonic state about
6 weeks longer due to the Thio-Sul placement in the band with
APP. This was tested by UNL and Dr. John Clapp.
Supplemental
irrigation was practiced.....The fields were managed in manner
that assured full holding capacity to 3 feet up to bloom. No
irrigation occurred in the critical bloom period. One irrigation
occurred after the bloom period to support the soybean growth
under the DNSW canopy.
One
irrigation of .5 inch occurred in March to improve germination
after seeding. Two applications of 1 inch each were made in
April. No irrigation occurred in the bloom period. After the
bloom period on June 7 th 1 inch of irrigation was added to
support the soybeans. A total of 9.5 inches of rain fell during
the growing period. A total of 14 inches was applied or fell
from the sky. About 4 to 6 inches estimated was stored in the
top 3 feet of soil. The crop did receive rain during the bloom
period.
Conclusions based on observation, testing, and comments from
experienced spring wheat producers and scientists.
1. Rod Row
samples and tissue samples indicated high yield and high protein
potential. Actually rod row samples indicated too much yield to
produce high protein in relation to the fertility applied. This
indicated very high nutrient efficiency due to the side dress
application of TAPPS or NH3, APP/ATS.
2. The Ortho
Ratio appears correct for protein....The N rate may need to be
reviewed as the yield goals are raised to 100 bu./A.
3. More seed
rows will be added to raise the seeding rate. A solid 10" seed
row area is planned by using the Kile opener or a third opener
between the 10" rows.
4. Timing of
nutrients to side dress application of NH3, APP/ATS, no-till
with 3 leaf spring wheat allowed much higher nutrient efficiency
and thrifty and healthy soybeans stands. The soybeans harvested
residual nutrients. Side dressing of DNSW appears to produce
high nutrient use efficiency.
5. The
Folicur Section 18 label is required along with a double
application at half rates to protect anthers and ovaries of each
berry. Actual onset of bloom can be varying with each
plant. Timing the Folicur application twice at half rate using a
special dual boom sprayer may give better results. A purpose
built sprayer is required.
6. The
Roundup Harvest Label proved very effective and worthwhile.
Harvest date and harvest efficiency was greatly improved.
7. In crop
weed control should be practiced. However, the weed control will
need to occur 3 to 4 weeks ahead of soybeans to avoid damage to
the soybeans from residual phenoxy herbicide.
8. Yield
goals of 100 bushels per acre will require one pre-plant
application of nutrients at 125 N, 55 P, 35 S and one side dress
application at 3 to 6 leaf wheat at 75 N, 35 P and 21 S. However
another method is being investigated with the Kile opener to
band the second side dress application with the drill opener in
a single pass. The drill opener will apply the toxic charge of
N,P and S.
9. A
micro-nutrient package applied in the band of Zn,Cu,B may be
tried to improve seed set of the DNSW and Soybeans.
To be
determined:
The soybeans
continue to show good growth characteristics. No disease
problems have surfaced. The plants continue to be healthy and
thrifty. Two soybean varieties planted are NK29C9 and Pioneer
93B09. Harvest should occur in about 30 days.
Several
reasons why the DNSW/soybeans look better than the Relay
Intercrop Hard Red Winter Wheat (HRWW)/soybeans are proposed.
1. The DNSW
produced 3 or 5 tillers and was seeded to population. The
winter wheat can tiller much more creating more of a canopy and
shading the soybeans. The DNSW is very stiff strawed with
uniform head height. The DNSW did not elongate as much as the
HRWW.
2. The DNSW
was fertilized with Anhydrous Ammonia, APP/ATS banded timely and
uniformly with the Exactrix single disc tool bar, no-till. The
low CV application banded in the root zone assures high
nutrient use efficiency by the spring wheat crop and the soybean
crop. The timing of nutrients side dressed was ideal for both
crops. The Relay Intercrop Winter wheat in the area was
fertilized with nitrate based 28-0-0 top dressed causing the
plant to elongate more or to shade the soybeans more. Some of
winter wheat in area did lodge. There appears to be an advantage
to fertilizing with NH3 since the spring wheat did not lodge,
was stiff strawed with an orange straw color (sulfur
response) and produced high proteins at 16%.
3. The
placed bands of NH3,APP/ATS were accessed by the soybeans after
the DNSW had completed nutrient uptake. Thus the beans were not
starved for nitrogen and were able to harvest the
residual placed NP&S. We have no means to compare to other
approaches scientifically. This is a general observation that
the soybeans were in better shape immediately following harvest
of the DNSW as compared to other fields of HRWW/soybeans in the
Relay Intercrop System.
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John Yockey
Exactrix, dual product, high speed single disc, no-till, side
dressing tool bar. The band spacing is15 inch average set at 12/18 spacing for corn side dress and preplant application and 10/20 spacing for side dressing Dark Northern Spring Wheat. An Exactrix 2KD weigh master applies NH3 using a coriolis mass flow meter which weighs the NH3 as it is applied. Port to port accuracy is less than 1% CV. Twin 1,000 gallon bottom outlet tanks produce true liquid NH3 flow at temperatures to 0*F. Twin 300 gallon tractor tanks carry APP/ATS or 10-34-0 and 12-0-0-26S. The nutrients are combined at the opener injection by means of a second Exactrix injection manifold system to form TAPPS. Nutrients are applied in an Ortho Ratio of 27-12-0-7S in both Corn and Dark Northern Spring Wheat. Application speeds to 12 to 14 mph are achieved with no-tillage application of nutrients. Nitrogen efficiency has been improved about 40% in corn production. Yield increases have been substantial in seed corn production in fact some fields have set record yields. As John would say "The plant is green from the bottom to the top and no pinch rows". Thio-Sul or ATS keeps the NH4 band in ammonic state 6 weeks longer and provides critical protein building sulfur to the Corn and DNSW. The Deere belted tractor adds real value for controlled traffic in Ridge-till and keeps compaction to a minimum. |
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Systems LLC www.exactrix.com exactrix@exactrix.com 509 995 1879 cell, Pacific. General office: 509-254 6854 4501 East Trent Ave. Spokane, WA 99212 |