shows that the pathogen could enter the groundwater easily at certain levels, the experiments were carried out by designing transport-enhancing, worst-case conditions consisting of infected fresh manure spread shortly before a major rainstorm on a coarse sandy soil with a short distance to ground water. Contamination is much less likely to occur when conditions are not as extreme, for example when manure is dry before the rainfall starts or when the groundwater is not as shallow.

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Contact: Sara Uttech
suttech@agronomy.org
608-273-8080
American Society of Agronomy
27-Feb-2004

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