Designing management zones is much easier using stable data. Soil and terrain are stable, they have been there millions, if not billions of years. The soils ability to hold water and make that available to plants is a crucial start point in design. Adding how water moves, does it create accumulation, shedding or neutral environments will add to the soils water availability.
Then you can worry about nutrition because you have a much better idea of yield potential.
You don’t need to complicate or make its sound more sophisticated by adding snapshots in time like remote sensing.
If you zone using base data you can back track as many years you have yield and test the results. If your trying to use more than this then you’re just creating questions.
Here is a quick interpretation of this data.
Zones 1,2 and 3 are lower EM with zone 3 being a water shed. Its higher yielding because if a wetter season. Zone 4,5 and 6 are slightly heavier soil and the range of yield from water accumulation to watershed is higher. Zones 7,8 and 9 are heavier soil than 4,5 and six and the result shows the range getting higher.
We can observer that yield is decrease as soil get heavier but is further impacted when the landscape derivative is inclusive.
We can also dig into the profit and loss of these zones and determine if there is a cost benefit to using variable rate.
How could this information be used in field next crop?