Tillage and cropping system effects on soil humic acid characteristics as determined by electron spin resonance and fluorescence spectroscopies

Author: Bayer C.   Martin-Neto L.   Mielniczuk J.   Saab S.d.C.   Milori D.M.P.   Bagnato V.S.  

Publisher: Elsevier

ISSN: 0016-7061

Source: Geoderma, Vol.105, Iss.1, 2002-01, pp. : 81-92

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