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TRANSCRIPT
In 2007, a field study was conducted by Purdue University in Indiana
to evaluate the performance of Wolf Trax Mn DDP in soybeans. Standard
grower practices were also included for comparison purposes. The results
of this study demonstrate that Mn DDP applied with starter fertilizer or as an in-season
foliar application increased soybean yield as compared to the control treatment plots
and plots that received starter fertilizer only.
BACKGROUNDManganese (Mn) deficiency is prevalent in soybeans grown
in several areas in North America. Often soil-applied Mn
alone is ineffective at correcting Mn deficiency because
chemical and biological reactions in the soil render Mn
unavailable. Foliar applications of Mn can be effective at
correcting Mn, but glyphosate has been shown to reduce
Mn availability when tank-mixed or sprayed within 7 days
of Mn application. Therefore, combinations of enhanced
soil-applied and foliar applications of Mn DDP may offer
a solution to Mn deficiency in soybeans.
ISSUE 7: 2016
Wolf Trax Mn DDP® Increases Soybean Yield
Wolf Trax DDP Nutrientsfeature three proprietarytechnologies that ensureeffective delivery of nutrition:
EvenCoatTM
Technology
Fertilizer coating technologyallows for blanket-likedistribution and more points ofinterception for young roots.
PlantActivTM
Formulation
Physically and chemicallydesigned – the Wolf Trax DDPparticle size is optimum forplant uptake.
FlexUseTM
Application
In fields with severe deficienciesor crops with high demand, DDP Nutrients can be appliedmultiple times in a season.
Wolf Trax Innovative Nutrients are unique, research-tested and field-proven micronutrient and secondary nutrientfertilizers. By making nutrients more accessible to plants when they are needed most, Wolf Trax products simplifynutrient management, boost crop performance and enhance the return on farmers’ fertilizer investment.
wolftrax.com
Starter only; July 5, 2007
Starter +Mn DDP +Foliar Mn DDP; July 5, 2007
Control - - - - - -
Starter 10-34-0 10 gal/ac - - - -
Starter + Mn DDP 10-34-0 10 gal/ac Mn DDP 8 oz/ac - -
Starter + Mn DDP 10-34-0 10 gal/ac Mn DDP 8 oz/ac Mn DDP 3 oz/acw/ foliar Mn DDP w/ glyphosate 1 qt. + 3.4 lbs AS/ac
Foliar Mn post Mn DDP 10 d 3 oz/acglyphosate post glyphosate 1 qt. + 3.4 lbs AS/ac
METHODSA field site was chosen that was known to result in Mn deficient soybeans at the Pinney Purdue Agricultural Center in
Porter County, Indiana. The soil series was a Sebewa clay loam with high soil P (30 ppm Bray-P), low soil Mn (12 ppm),
5.1% organic matter, pH of 6.5 and CEC of 22.3 meq/100 g. ‘Becks 31NRR’ soybeans were planted in 30” rows on May
10th at a plant density of 145,000 seeds/acre. Plots were 4 rows wide and 91 feet long. Each fertilizer treatment (Table 1)
was replicated six times in a randomized complete block design (Table 1). Grain yield was harvested from the center two
rows and yield was corrected to 13% moisture content. All data was analyzed by analysis of variance and treatment
comparisons were made with single-degree-of-freedom contrasts.
Control Starter Starter+Mn DDP
Starter+Mn DDP
+Foliar Mnw/ glyphosate
Foliar Mn10 d post
glyphosate
Gra
in Y
ield
(bu/
ac)
Thou
sand
Ker
nel W
eigh
t (g)
0
10
20
30
40
50
60
70
52.2
206 208 217 226 219
52.758.0
61.556.4
0
50
100
150
200
250
Thousand Kernel WeightP = 0.007
YieldP = 0.003
b ba
aa
Figure 1. Grain yield (bu/ac) and thousand kernel weight (g) of soybeans treated with Mn DDP.
The results of this study demonstrate that a soil application of Mn DDP with starter fertilizer is a beneficial
addition to current grower practices in soybeans that are prone to manganese deficiencies. While no further
benefit was observed when Mn DDP was also applied as a foliar application, under the conditions of this
study, both soil and foliar applications of Mn DDP were effective agronomic tools for satisfying the crops
requirement for manganese. Mn DDP offers growers flexible application options for the growing season.
SUMMARY
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Copyright © 2016, All Rights Reserved - Compass Minerals Manitoba Inc. Wolf Trax and Design, DDP, EvenCoat, PlantActiv and FlexUse are trademarks of Compass Minerals Manitoba Inc. Compass Minerals is the proud supplier of Wolf Trax Innovative Nutrients. Not all products are registered in all areas.Contact [email protected] for more information.
RESULTSGrain yield and seed weight were highly
correlated (r=0.97) and both parameters
were significantly increased by Mn DDP
soil-applied with a starter fertilizer; as a
foliar application; or as both application
methods combined (Figure 1). Starter
fertilizer without Mn DDP had no
significant effect on soybean yield or seed
weight (Figure 1). The combined
application of Mn DDP did not provide any
additional benefit over either treatment
alone (Figure 1).
Starter fertilizer with Mn DDP was applied at seeding, 2” below and 2” to the side of the seed row, and glyphosate was applied at the 4th true leaf stage in soybeans.
Table 1. Starter Fertilizer with Mn DDP
Treatment Starter Application Starter Mn DDP Application Foliar Application Name Fertilizer Rate Mn Rate Mn DDP Rate
b ba a a