When we import the gssurgo data, a plastic_limit is computed via this equation
plastic_limit = 14.22 + 0.005 clay clay + 3.63 om - 0.048 clay * om
This equation does not work for all soils and we can get some values quite detached from realistic values. For dynamic tillage/planting, we use this value for our soil moisture check. I'm proposing to replace any value over 40% with a diagnostic value derived from WEPP output inspection of 42% of free water capacity.
When we import the gssurgo data, a plastic_limit is computed via this equation
This equation does not work for all soils and we can get some values quite detached from realistic values. For dynamic tillage/planting, we use this value for our soil moisture check. I'm proposing to replace any value over 40% with a diagnostic value derived from WEPP output inspection of 42% of free water capacity.