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Comparison of carbon and nitrogen determination methods for samples of a Paleudult subjected to no-till cropping systems
Provedor de dados: 63
Autores: Dieckow,Jeferson; Mielniczuk,João; Knicker,Heike; Bayer,Cimélio; Dick,Deborah Pinheiro; Kögel-Knabner,Ingrid.
Organic carbon (C) concentration evaluated by the Walkley-Black method, and total nitrogen(N)concentration determined by Kjeldahl method, were compared with corresponding results of C and N concentrations obtained through the dry combustion method (Elementar Vario EL analyzer), using samples of ten soil layers down to the depth of 107.5 cm of a kaolinitic Typic Paleudult (220-418 g clay kg-1 along the profile) subjected to no-till cropping systems [fallow bare soil, pigeon pea (Cajanus cajan L. Millsp.) plus maize, and lablab (Lablab purpureum L. Sweet) plus maize]. A close correlation (R² &gt; 0.96) was observed between the C results of the Walkley-Black and dry combustion methods, but a correction was suggested to be applied to C results of Walkley-Black...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Walkley-Black; Kjeldahl; Wet combustion; Dry combustion.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000500011