Posted 10/15/2020 21:21 (#8547919 - in reply to #8547837) Subject: RE: Soil grids
I'm just saying we started soil sampling with square grids in the mid 1990's, but we soon realized they didn't match the variables in most fields very well, so we transitioned to management zones.
For example, I have asked growers what features appear in "squares" on a yield map? Don't yield maps mostly feature polygons which are specifically related to soil type, drainage, topography, or other field specific features?
I'm just suggesting you draw your polygons around the variability contours and sample them separately and adjust the sizes of the management zones based on the variability in that area of the field (lots of variability = more regions, less variability = less regions).