50% irrigation savings on a US golf course — for context

Why this case study sits on our site

The 50% irrigation-savings figure for biochar on golf courses comes up regularly in conversation. We want to be clear: that figure belongs to Biochar Now, a US biochar producer based in Colorado. It is not a Possible Agriculture result, and we don’t claim it.

We include it here because:

1. The mechanism is sound — biochar at meaningful inclusion rates in a sand-profile root zone does substantially increase water retention, and the magnitude is plausible in California’s irrigation context.
2. The product profile is broadly similar to ours — high-temperature pyrolysis, activated, hardwood feedstock.
3. Pretending the figure doesn’t exist would be silly; better to give it its proper attribution and let course superintendents draw their own conclusions about what’s transferable.

The result, as Biochar Now report it

Biochar Now’s published case study reports up to 50% reduction in irrigation water on a California golf course after biochar amendment to fairway and rough root zones. The result is specific to that site, that product, that climate, and that irrigation baseline.

What this means for an Australian course considering biochar

The Possible Agriculture-specific number you should plan against is up to 40% irrigation savings in trials where our biochar has been applied — our own anchor, from our own brochure data. Anything above that is upside; treat it as evidence-based optimism rather than a commitment.

For a serious procurement conversation, the peer-reviewed work to focus on is Yu et al. 2013 (water-holding doubling at 9% biochar in sandy soils) — see our biochar library.

Want to run a pilot on your course?

A pilot trial on a single green or practice fairway is the right way to validate biochar for your specific site. We supply the biochar, help with trial design, and review the data alongside your superintendent. Talk to us about scoping a golf trial.