High-tech investments like this are unnecessary when farmers practice conservation agriculture, the three components of which are no-till, constant cover crops, and non-patterned crop rotation. Annual weeds will be eliminated; perennials may need tillage every few years. The goal is to completely eliminate herbicide use. See David R. Montgomery’s book “Growing a Revolution,” and the NY Times Magazine piece “Can Dirt Save the Earth?” from April 18, 2018.
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