You can't manage what you don't measure.
The GroundTruth Lysimeter incorporates the best features from the design of the leading research lysimeters used by major NZ research institutions (column lysimeters and fluxmeters), but has a much greater area (equivalent to 15 column lysimeters or 95 fluxmeters).
Statistically, one GroundTruth lysimeter is more accurate than a 12-fluxmeter site, and four have equivalent accuracy to the most advanced suction cup arrays used by New Zealand universities and crown research institutes.
Doesn't interfere with farming
Can be positioned almost anywhere in a paddock, completely below-ground and invisible, so it can be cultivated and grazed without harm. No need to remove equipment before cultivating - staff can just forget it exists. The only above-ground component is a suitcase-sized box at the fenceline (the autosampler), up to 150m from the lysimeter itself.
See what is happening today, so you can make decisions this season and actively manage your environmental losses. Don't just estimate what happened last year in an annual modelling exercise.
Automatically records drainage, day and night, and collects water for analysis. You just put the water sample in the mail.
Install the Lysimeter yourself for minimal capital investment. Autosampler available on a simple quarterly lease that includes all data management, repairs and nutrient analysis costs.
Frequently Asked Questions
A 2-page printable brochure explaining the GroundTruth system, with photographs.
A technical report explaining the lysimeter itself and the advantages / disadvantages when compared to other leaching measurement systems.
Technical: Site design
A technical report explaining the number of lysimeters required to accurately measure leaching loss in a range of situations.
The initial development of the lysimeter was part-funded by a generous AgMardt grant, which was immensely beneficial in kick-starting lysimeter development.
The Foundation for Arable Research funded the installation of an initial prototype lysimeter + autosampler.
Financial support from Callaghan Innovation for business development advice is greatly appreciated.
The vast majority of the system development cost has been self-funded by Grounded.