Jacobs Turf — soil-first lawn care in Atlanta
The JT Lab — soil test plots and field studies in Atlanta

The JT Lab

We run the experiments so your lawn isn’t one

We test products before we recommend them and log every soil sample we pull — so a recommendation is something we have watched work, not a guess off a supplier’s flyer.

See the Atlanta soil data →

Open data

What the archive says about Atlanta soil

Pulled from 99 anonymized soil tests through the UGA / Fulton County lab — the clearest picture anyone has of what is actually under Atlanta lawns. Median pH 6.24, median CEC 7.39 (n=90), zero calcium deficiencies in 99 tests.

Read the full dataset →

On the bench

Questions we're testing next

Question 01 · Not started yet

Bio-Charge vs. the bag

A head-to-head on one lawn: a strip fed only our Bio-Charge spray against a strip on conventional synthetic fertilizer. Same soil, same season, measured.

Question 03 · Not started yet

How far can organic matter move the tank?

No lime on any plot, a true untreated control strip, and organic matter measured before and after — because OM is the only number that reflects a real change in holding capacity. Lime alone would inflate the calculated CEC and fake a win.

Get your lawn in the archive

Every entry starts with a real lab test. See where your soil falls.

Test your soil →