Rising plate meter or phone camera?
The rising plate meter has been the default pasture measuring tool for decades. Here is what it does well, where photo-based measurement does more, and how to decide which belongs on your farm.
What a rising plate meter actually measures
A rising plate meter measures compressed sward height: the plate rests on the pasture and the counter records height in half-centimetre clicks. You take dozens of drops per paddock, average them, and convert height to cover with a formula — usually a seasonal equation that assumes a sward density.
That last step is the weak point. The conversion from height to kilograms of dry matter assumes density, and density changes with season, species and grazing history. Two swards at the same height can carry very different amounts of feed.
What a photo measures instead
Pasture Ai's model reads the sward image directly — height, density, colour, species and structure together — rather than inferring feed from height alone. The result is an estimate of pasture cover in kgDM/ha plus feed quality metrics no plate meter can give you: DM%, CP%, MJME and NDF%.
There is nothing to buy beyond the phone you already have, nothing to carry on the walk, no counter to bump and no formula to update. You can average up to 10 photo assessments per paddock, and every reading saves to the paddock history automatically.
Consistency is the real comparison
Plate meters reward a disciplined operator: same walk pattern, same number of drops, same conversion equation. Photo measurement rewards the same discipline: same height above the sward, same angle, even light. Either way, the trend line matters more than any single reading — and Pasture Ai builds that trend line for you because every assessment is saved without data entry.
Many farms keep a plate meter in the shed for periodic cross-checks while running the weekly walk on the app. The comparison page breaks the two methods down line by line.
Photo measurement vs rising plate meter
- No hardware to buy, carry, break or recalibrate
- Cover in kgDM/ha plus DM%, CP%, MJME and NDF% per reading
- Up to 10 assessments averaged per paddock
- Automatic record keeping — no notebook, no spreadsheet
- Feed wedge and growth rate built from your walk
- Anyone on the team can measure to the same standard
Frequently asked questions
Is a rising plate meter more accurate than an app?
A plate meter measures compressed height consistently, but converting height to cover assumes sward density, which varies. Photo-based cover reads density and structure directly. In practice, consistency of method matters more than the tool — pick one and use it the same way every week.
Do I still need my plate meter?
Most farms don't. Some keep one for occasional cross-checks while the weekly walk runs on the app. The feed quality metrics (DM%, CP%, MJME, NDF%) are only available from the photo assessment.
How much does a rising plate meter cost compared with the app?
Plate meters are a hardware purchase plus your time recording and converting readings. Pasture Ai is a subscription with a 7-day free trial — no hardware, and record keeping is automatic.
Where can I see a detailed comparison?
Our plate meter alternative page compares equipment, workflow and the metrics each method returns, line by line.
Try the walk without the plate
Take the phone you already carry, photograph your paddocks, and compare the numbers with what your eye told you.
A card is required to start the trial. Cancel anytime from your Account page or email support@pastureai.ai.