VM0042 is Verra's rulebook for measuring how much extra carbon a farm locks into its soil when it switches to better practices. Here's what it says — in plain English.
What VM0042 actually is
It's a document that tells you: (a) what farming changes count, (b) how to measure the carbon that gets stored, and (c) how a third-party auditor will check your claim. If your project follows VM0042, Verra will issue credits you can sell globally.
What practices qualify
Four big ones. Cover cropping between main seasons. No-till or reduced-till instead of ploughing. Keeping crop residue on the field. Adding organic matter (compost, manure, biochar). Do any of these consistently and you get a soil carbon uplift.
How the measurement works
You sample soil from 10–15 spots per field at the start (baseline) and every 3–5 years after (re-sample). A lab measures organic carbon. The difference — after adjusting for weather and crop — is your credit. Newer versions also allow modelling with satellite data to reduce sampling costs.
The India catch
Indian smallholders often don't have a stable baseline sample. VM0042 accepts pooled baselines across similar plots, which is where an aggregator like Ecarbify does the heavy lifting — pooling 5,000+ farms into one project keeps costs down and integrity up.