Chilean journal of agricultural research On-line version ISSN 0718-5839
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LIU, Zunqi et al. Maize stover biochar increases urea ( 15 N isotope) retention in soils but does not promote its acquisition by plants during a 4-year pot experiment. Chil. j. agric. res. [online]. 2017, vol.77, n.4, pp.382-389.