Geology Matters: Ontario farmer uses mining background to identify better soils
John Slack at Spanish River Carbonatite Complex Educated at the Haileybury School of Mines, John Slack is a Canadian mining technologist-turned-farmer who uses his thorough understanding of geology to promote remineralization and sustainable soil fertility. “Promoting the use of rock dust — and the throwing away of your fertilizer bag — has been a really […]
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