As spring sampling season approaches, I think it's important to understand your company's equations. At one time, your Agronomy manager or GIS coordinator entered your equation sets into SOILMAP.
Equation syntax will vary, but an easy example to show is the N recommendation where there is generally just one equation.
( ( 200 - (OM * 8.3 ) ) + ( ( Corn YLD - 150 ) - 35 ) )
This example gives you the actual N needed for a 60ft. cell, and shows you how we convert your soil sample data into a variable rate N recommendation.
You can also setup equations for different conditions of the field (soil-type, soil test, MZ attribute, or a combination of the three). For example: you can write an equation that applies no nitrogen stabilizer in well-drained soils (i.e. Gamore Loam) by using the "soil types" attribute.
It's also important to know that you are not limited to three product recs. Perhaps you want to add a double gold recommendation, which would call for higher yield goals and higher fertility, or you would like to go to the next step in management zones and setup equations for your A, B, & C zones.