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Biochar effects and behavior should also be modelled at temporal scales similar to its expected functional lifetime in soils. Finally, when existing soil data are insufficient, soil sampling and analysis procedures need to be described as part of a biochar certification procedure.<\/jats:p>","DOI":"10.1590\/s0100-204x2012000500003","type":"journal-article","created":{"date-parts":[[2012,6,23]],"date-time":"2012-06-23T10:01:29Z","timestamp":1340445689000},"page":"649-653","source":"Crossref","is-referenced-by-count":34,"title":["Sustainability, certification, and regulation of biochar"],"prefix":"10.1590","volume":"47","author":[{"given":"Frank G. 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