The Biochar Index
You rake the ash and haul the brush to the curb, letting a season's carbon leave as smoke and trash.
You build a soil that holds water and life for a century, and write down the recipe so it repeats.
A Field Journal for Biochar & Soil Carbon
A field journal for pyrolysis batches, charging protocols, and the 6, 12 and 24-month soil chemistry that follows. Not a primer. A working record — built to be kept on the bench, opened to the next blank entry, and filled in with a pencil.
Instant PDF the moment you check out — print at home or read on any device. Start today for less than a sack of lump charcoal.
Also on Amazon: Paperback · Hardcover
- Instant digital delivery
- Secure checkout
- Digital: final sale · Print: 30-day returns
- Ships from the US
Gift A gift worth keeping. Ships in clean, unbranded packaging — ready to give straight from the box.
Turn the pages.
See exactly what you fill in.
The real interior — drag a corner to flip through the logs, references and grids.
6 sections.
One field-tested
ledger.
Each section is built for one job — a compost pile to log, a brine chart to consult, a soil audit to run. Nothing decorative. Everything in service of the next entry.
Field-tested
layouts.
Structured layouts with room to write — the reference charts and guided logs you'll actually use, page after page.
Field notes from readers — coming in.
The Codex is newly in the wild. Verified reviews from the first print run will appear here as they come in.
Own a volume? Leave a review →Same phase, related work
Questions, answered
How is it delivered — and how fast?
The digital edition is an instant download — the print-ready PDF arrives by email the moment checkout completes, readable on any device or printable at home. Paperback and hardcover are produced on demand and ship from the US, typically 5–8 business days.
What's the difference between the formats?
Same interior, 3 ways to use it. Digital ($9.99) is the instant PDF — print the pages you need, as often as you need. Paperback is the everyday bench copy. Hardcover is the durable, giftable edition. Buy digital to start today; add print anytime.
What's actually inside?
A working biochar · soil carbon journal — structured fields, not blank pages: 50 biochar batch logs · feedstock, pyrolysis curve, aeration; 20 soil-impact trackers · 6, 12 and 24-month readings; 10 integration logs · biochar + compost blends; Field guide · making it safely, charging, applying to soil. 6 × 9 inches, undated.
Is it for beginners?
Yes — the reference pages teach as you log, so a first-timer can follow the targets and a seasoned keeper moves faster. You learn by doing, not by reading a textbook.
Is it dated? When can I start?
It's undated by design — start any time, any season, and never waste a page. You write the dates as you go.
Can I give it as a gift?
It's made to give — ships in clean, unbranded packaging, and the hardcover makes a keepsake for the keeper who has every tool but no system.
Paper and size?
6 × 9 inches, matte cover, white 80 gsm paper, made for pencil.
Returns?
Digital editions are final sale once the download has been accessed (faulty file or a charge in error? email us within 14 days). Printed journals can be returned within 30 days of delivery in unused, original condition. The Complete Codex (Digital) bundle also carries a 30-day money-back guarantee.
20 pages of real journal content from 5 volumes. See the system before you commit.
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