Soil biology
The food web — microbes, fungi, worms — scored into one number.
The soil is a city
One gram of healthy soil holds more microbes than there are people on earth. They're the ones feeding your crop — the crop just cashes the check.
How we score it
microbes biomass, by soil respiration fungi mycorrhizal networks, the soil's internet worms casts per liter, the visible vote index one number, 0–100, you can watch move
Why it matters
Chemistry feeds a season. Biology feeds a farm. The index tells you which one you're building.