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This episode, the topic is biofumigation, a biological form of pest control that involves growing and turning under certain cover crop species that naturally suppress many weeds and soil-borne diseases and pests.

In this episode:

Tom Forge, a research scientist at the Summerland Research & Development Centre.

Kip Cantrell, garlic grower at Thistle Farm in the Creston Valley.

This document from Oregon State University Extension is a good primer on biofumigation.