SS 1.2: Transforming Idaho agriculture from the ground up

Dev Shrestha is a University of Idaho engineering professor exploring the future of farming, starting with the soil beneath our feet. He’s developing affordable soil sensors and studying the power of biochar to help farmers conserve moisture, increase yields and build a more resilient, sustainable future for Idaho agriculture. In this episode, he shares how improving soil health on the Palouse could transform the way we grow food.

Email us at vandaltheory@uidaho.edu.

Building healthier soils

The Palouse’s rolling hills are both beautiful and challenging for farmers. Thin topsoil and limited moisture at the hilltops lead to lower yields, while nutrients and water accumulate in the valleys. Shrestha’s research shows that biochar — a stable, carbon‑rich material made by heating plant waste without oxygen — can help these dry areas hold more water and nutrients through the growing season. By targeting biochar to the hilltops where it’s needed most, farmers can see the greatest benefit.

Biochar’s promise has long been limited by its cost, but Shrestha and his team are tackling that challenge. They are mapping which areas of a field offer the highest return on investment, then testing biochar performance using a dense network of low‑cost, in‑house‑built soil sensors. These sensors monitor moisture and temperature throughout the season, giving farmers data to guide precision biochar applications. At the same time, the research could create new demand for Idaho’s abundant wood and agricultural waste, building a foundation for a local biochar industry.

Shrestha envisions an Idaho where biochar and affordable soil monitoring help farmers adapt to changing conditions while improving long‑term soil health. Combining waste‑to‑resource innovations with practical tools empowers growers to sustain their land, support the state’s agricultural economy and meet the challenges of climate change. 

Music

“Young Republicans” by Steve Combs via freemusicarchive.org, not modified.

Chapters

(00:00) Introduction
(00:52) What is biochar?
(03:34) Making a sustainable solution more affordable
(06:25) Innovative soil sensors
(08:10) Building a biochar industry