Cooking Better Biochar: Study Improves Recipe for Soil Additive

http://www.sciencedaily.com/releases/2012/03/120322131508.htm

ScienceDaily (Mar. 22, 2012) — Backyard gardeners who make their own charcoal soil additives, or biochar, should take care to heat their charcoal to at least 450 degrees Celsius to ensure that water and nutrients get to their plants, according to a new study by Rice University scientists.

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