Agriculture, Volume 11, Issue 1
2021 January - 82 articles
Cover Story: Incorporating manure into soil can add nutrients, improve soil structure and enhance biodiversity, improving the sustainability of vegetable production. Manure can contain human pathogens such as Escherichia coli, Listeria monocytogenes and Salmonella spp. While these bacteria can potentially contaminate vegetables, populations in soil often decline rapidly over time. Our trials found that E. coli populations in soil fell close to or below detectable levels within 50 days under Australian field conditions. At least 99% of Salmonella spp. died within 3 weeks, but the bacteria remained occasionally detectable (with enrichment) after 50 days. Listeria spp. was the most persistent in soil, but was not detected on lettuce at harvest maturity. The results suggest that Australia’s current guideline for at least 90 days between manure application and harvest reduces contamination risk. View this paper - Issues are regarded as officially published after their release is announced to the table of contents alert mailing list .
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