Washington State University (WSU) researchers, in collaboration with partner institutions, are launching a six-year study to examine how hemp rotations impact soil health and crop performance when combined with biocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More. The project, funded by a $5 million grant from the U.S. Department of Energy, will focus on wheat, corn, chickpeas, and other staple crops.

The study involves collaboration with tribal farmers from the Yakama and Colville Nations, as well as a private grower in Washington. Scientists from WSU, Pacific Northwest National Laboratory, and the University of Connecticut will analyze changes in soil chemistry, crop yield, and overall ecosystem health.

Hemp’s deep roots can break up compacted soils, reduce erosion, and help crops access water and nutrients more effectively. It also plays a role in phytoremediationThis is a technique that uses plants to clean up contaminated soil or water. Biochar can enhance phytoremediation by improving soil conditions and promoting plant growth, allowing plants to absorb and break down pollutants more effectively.   More, removing harmful contaminants from the soil. Researchers will evaluate how different hemp rotations, combined with various biochar applications, influence soil conditions over time.

The project includes testing over a dozen biochar treatments, varying in application rates and combinations with fertilizers. Researchers expect that using biochar with hemp will enhance soil fertility, reduce reliance on synthetic fertilizers, and improve overall crop resilience.

A private company, Yard Stick PBC, is contributing soil analysis technology to measure carbon levels and other key soil health indicators. The long-term goal is to develop sustainable farming strategies that improve soil quality while reducing environmental impact and input costs for growers.

LEARN MORE: New study takes long-term look at how biochar and hemp improve yields, crops