Abstract
Abstract Accurate and precise estimation of weed seed bank populations is critical to studying weed seed bank demographics. Research was conducted over 3 site-years in Montana to (1) examine the spatial distribution of wild oat seed banks on a small scale (1 m2 plots), (2) compare wild oat seed bank density sample means and precision between two soil samplers, and (3) predict the sample area needed to quantify a range of wild oat seed bank densities at several levels of precision. Seed bank sample means obtained with a large sampler (10- by 10-cm box) were greater than means obtained with a small sampler (4.4- or 3.8-cm-diam cylinder) for 15 of 18 seed banks. There was no clear advantage in precision (SE/mean) when sampling seed banks using a large number of small soil samples rather than using a small number of large soil samples. Furthermore, at very low seed bank densities, using a small number of large samples gave better precision. Precision improved as sample number increased for each seed bank at e...
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