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. 2018 Sep 17;13(9):e0203385. doi: 10.1371/journal.pone.0203385

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© 2018 Vaga, Huhtanen

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 5 — Ammonia ¹⁵N excess pool (¹⁵NEP) size (μg) with unlabelled soluble N (SN, filled symbols) and insoluble N (ISN, open symbols) fractions. Formic acid-treated silages (FAS; dotted line), untreated silages (UTS; dashed line), dried grass (DG15; long dashed line). Time × treatment interaction for ISN fraction is P = 0.14 and for SN fraction P < 0.001.