Update: Our three main enhanced weathering experiments

An overview of our enhanced weathering experiments in fields and in a greenhouse.

Over the past three years we have run three enhanced weathering experiments in fields and in a greenhouse in which we are using various monitoring approaches to assess the carbon dioxide removal effects. Here is an overview of these experiments.

XXL LYSIMETER PROJECT

In May 2022 we set up 20 large 300-liter water buckets converted into lysimeters using the in-situ soil. We used four basalt treatment amounts (0, 100, 200, and 400 t/ha of Eifelgold basalt, grain sizes 20 and 2,000 µm, with 4 replicas each.

ALFALFA EXPERIMENT IN GREECE

Our EW field experiment in Larissa/Greece started in June 2022 and features local agricultural soil combined with Greek olivine rich rock dust in 3 variations with 5 replicates each: untreated controls, 50 t/ha and 100 t/ha rock dust.

GREENHOUSE EXPERIMENT

Since January 2023 we have been running a greenhouse experiment. We have up to 400 experiment pots with up to 100 variations of 17 soils and 14 feedstock materials.

Read more details in our blog post "Update: Our three main enhanced weathering experiments"

https://www.carbon-drawdown.de/blog/2024-8-2-update-our-three-main-enhanced-weathering-experiments