Determining Management Zones

1
Determining Management Zones

• Spizzy Farm
• Field 1378F

2
Yield Map 2003 Wheat

• This is one of four yield maps that were used to
  create management zones.

3
Electric Conductivity (EC)
EC is done by pulling a 6 wide machine every 60
across a field. It has straight disk blades that
penetrate the soil surface and record the depth
an electric current travels. This only has to be
done once for each field because it will
never change. This shows soil types that are
useful in determining management zones.
4
Grid Sample points
These points are located within 2.5 acre grids.
They are GPS referenced so I can return to them
in the future. Soil analysis from each of these
points are also used to help determine
management zones.
5
Management Zones

• This was created by overlaying it on several
  yield maps, and the EC map.

6
Determining Fertilizer Rates

• I use a spread sheet like this one for each
  field. I enter soil sample results and other
  information to calculate the rate of a pre
  determined fertilizer blend. 1378F.xls

7
Prescription Map

• This map was created from the management zone map
  and each zone is then assigned a fertilizer rate
  in gallons per acre. This map is then loaded into
  a program in an iPAQ (PDA) . This program then
  regulates the fertilizer controller. This is all
  GPS referenced.

8
As applied Map

• This map was recorded when a 60-30-0 blend of
  fertilizer was applied with a field cultivator.

9
Summary

• All of these steps are done to Maximize
  Production at Minimal Cost even though lots of
  time is spent recording and planning.