Understand the physical soil differences behind within-field performance — and use that information alongside soil tests and yield history to make better management decisions.
The System
Cool Soil IQ™ combines mapped soils, terrain analysis, field observations, soil profile information, fertility data, and yield history to characterize meaningful differences within and among fields. The goal is not to replace soil testing or your existing agronomy team. It is to add the physical soil context those datasets do not provide on their own.
The system has two components: ZoneIQ™ works within a field, delineating and characterizing management zones from terrain, mapped soils, soil depth, and restrictive layers. FieldIQ™ rolls those zone results up to the field level, so fields can be compared across the operation.
Two areas of the same field can test nearly identical for phosphorus and potassium and still produce very different yields, season after season.
Soil tests measure nutrient levels. They don't measure how soil physically performs. Depth to a restrictive layer, drainage class, available water holding capacity, landscape position — these physical properties determine how crops actually access nutrients throughout a season.
That is why some zones consistently underperform even when the test says they shouldn't, and why a single field-wide rate rarely fits every acre equally well.
In practice: We have mapped fields that the county soil survey shows as a single series. ZoneIQ™ analysis identified multiple distinct zones with materially different physical capability — zones that had been managed identically for 20+ years.
ZoneIQ™ documents these physical properties and interprets them alongside your soil-test and yield data.
We start with what the soil physically is before we ever talk about what to put on it. Fertility decisions layered on top of physical soil capability data are fundamentally more accurate than fertility decisions made from test results alone.
Using terrain analysis and LiDAR elevation data, we identify zones based on how water moves across and through your landscape — dry ridges, transitional slopes, wet receiving areas. These are the positions where soil conditions differ most within a field.
Physical soil borings in each zone confirm what the terrain predicts. We measure and record texture at every horizon, drainage class, depth to water table indicators, and depth to any restrictive layer. Real data, not estimates.
Each zone receives a ZoneIQ™ score — a weighted capability index based on total available water holding capacity, drainage, surface texture, subsoil, A horizon quality, slope, and parent material. A standardized index of the physical soil characteristics that influence productive capability.
Fertility targets are set by zone profile — not by field average. A shallow restrictive-layer zone needs different P and K targets than a deep well-drained zone, even if they test the same. The prescription matches the physical reality.
A variable rate application (VRT) map your fertilizer dealer can load directly into their spreader. Zone-by-zone rates for P and K. A product order summary with total lbs needed. Ready to act on immediately.
Zone soil tests retaken on a zone-specific schedule. Prescriptions updated as tests come in. Fertility targets refined as yield data accumulates. Each year's data makes next year's decisions sharper.
ZoneIQ™ works within a field. It delineates management zones using mapped soil information, terrain, and landscape position, and — where field verification is included — tests those boundaries with soil borings. Each zone receives a ZoneIQ™ score.
The ZoneIQ™ score is a relative soil capability index. It summarizes selected physical soil and landscape factors — rooting depth, drainage, texture, and restrictive layers — in a consistent framework so zones can be compared on the same basis. The reference point of 100 reflects deep, well-drained Wisconsinan glacial till silt loam typical of east-central Indiana. Scores are not predicted yield percentages, yield guarantees, or substitutes for actual yield history.
FieldIQ™ rolls those zone results up to the field level, so whole fields can be compared against one another across the operation.
Why this matters for fertility: Physical soil capability adds context to fertility decisions. Two zones with similar soil-test values may not warrant identical investment when rooting depth, drainage, water-holding capacity, historical productivity, and realistic yield potential differ. Cool Soil IQ™ uses those differences alongside soil-test and yield data to help set zone-specific management priorities.
A relative index of physical soil characteristics, referenced to east-central Indiana Wisconsinan glacial till soils. Not a predicted yield percentage or a guarantee.
Cool Soil Consulting does not sell fertilizer, seed, crop protection products, or application services. Our revenue comes entirely from consulting fees, which means we can work alongside your existing agronomist, retailer, or applicator while providing an independent soil-science perspective.
See Services & Pricing Schedule a Conversation