Effect of crop rotation on weed biomass and density literature summary NicholsVirginia WeisbergerDavid LiebmanMatt 2019 <p>The dataset consists of data extracted from a systematic search of peer-reviewed literature using ISI Web of Knowledge (WoS). Searches were conducted using the following Boolean string:</p><p><br></p> <p><i>("crop rotation*" OR "crop sequence*" OR "multiple cropping*" OR “organic”) AND (management* OR control*) AND ("weed biomass*" OR "weed density*" OR "weed seed bank*") NOT (orchard* OR vineyard* OR agroforestry*)</i><br></p><p><br></p><p>No geographical or language restrictions were applied to the screening process, and the search period in ISI WoS, in both cases, was “All years” (i.e. 1864-2018).</p> <p>Criteria for inclusion in the database were</p> <ol><li>Articles were published in peer-reviewed journals (as opposed to book chapters or conference abstracts)</li><li>Articles were based on studies conducted with structured experimental designs in a field setting</li><li>Articles reported one or both of the following response variables: weed biomass and weed density</li><li>Studies included at least one comparison of weed response from a simplified rotation (control) and a diversified rotation (treatment).</li></ol> <p>We restricted our selection process to studies that used harvested crops (i.e., grain, fruit, tuber, root, or forage biomass) and avoided studies where rotational diversity was enhanced only by inclusion of a non-harvested cover crop. A full list of these publications and the PRISMA flow diagram detailing the literature search process can be found included in this database package.</p><p><br></p><p>This dataset supports the publication: Weisberger D, Nichols V, Liebman M (2019) Does diversifying crop rotations suppress weeds? A meta-analysis. <i>PLoS ONE</i> 14(7): e0219847. https://doi.org/10.1371/journal.pone.0219847</p><p><br></p><p><b>Version history:</b> v1. article submission dataset; v2. revised dataset; v3. metadata update to include article;<br></p>