Grid Soil Sampling

VRT UREA 46-0-0 Application Map	VRT DAP 18-46-0 Application Map

You can accurately utilize the Nitrogen in the DAP, for obtaining your Nitrogen goal, by using an “off-set” Nitrogen Application Map.  By variable rate applying UREA or NH3 on fields that have been applied with DAP to correct Phosphorus deficiencies, you can have a uniform nitrogen application to meet your total “N’ requirements for less cost.

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The above 18-46-0 map had an average spread rate of 195 Lbs./ac; the 46-0-0 map had an average spread rate of 205 Lbs./ac.  Yield goal is 180 bu./ac; total 18-46-0 needed is 26,469 Lbs., Soybean “N” credit is 30 Lbs., and total 46-0-0 needed is 32,071.6 Lbs. 

Let’s do the Math? 

180 bu./ac yield * 1.2 units of “N”/bu = 216 units – Soybean Cr. (30) *133.58 acres= 24,846 units of nitrogen 

Total amount of NH3 typically needed = 15.15 ton * $450/ton = $6,817.50 ($51.04/ac + $4.25 appl. = $55.29/ac)

Total amount of UREA typically needed = 27 ton * $310/ton = $8,370.00 ($62.66/ac + $4.25 appl.  = $66.91/ac) 

Total amount of 28% typically needed = 44.37 ton * $220/ton = $9,761.40 ($73.08/ac + $4.25 appl. = $77.33/ac)

Cost of VRT applied Urea using DAP “N” Cr. = 16.04 ton * $310/ton = $4,972 ($37.22/ac + $6.50 appl. = $43.72/ac) cost savings in product of $4,061 ($23.19/ac in product and application savings)

Then you say, “well there is extra cost of the grid sampling and application” well here it is broken out by the acre.

Grid soil testing = $8.00/ ac + 2^nd trip VRT application would be $5.50 = $13.50/ac

($23.19 – $13.50 = $9.69)

Savings would still be $9.69/ac * 133.58 acres = $1,294.39 TOTAL SAVINGS!!!!!!!

• Our VRT Machine has two bins with a Granular bin.

• This example called for two VRT applications.  We spread DAP and Potash with one application and came back with a second application with the UREA. 

• Not all applications will call for two applications

• 1.2 units of “N”/bu was used for this example, the average producers usage for this area is .92 to 1.1 units of “N” per bushel

• Soil sampling fee can be split out for four years at $2 acre per year for four years
  

Drainage Tile Identification
Drainage Tile