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Judson, H.G., Fraser, P.M., Peterson, M.E. and Edwards, G.R. 2018. Specific genotypes of plantain (Plantago lanceolata) vary in their impact on sheep urine volume and nitrification in the urine patch. Journal of New Zealand Grasslands. 80, (Nov. 2018), 125–128. DOI:https://doi.org/10.33584/jnzg.2018.80.335.