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 Author(s): BYRNE, C. M.; NOVOTNY, E. H.; HATCHER, P. G.; HAYES, M. H. B. Humin is defined as the fraction of the humic substances (HS) that is insoluble in aqueous solution at any pH value (1). Because of its insolubility it has been the least studied of all the humic frac... ... |
 Author(s): SONG, G.; NOVOTNY, E. H.; HAYES, M. H. B.; AZEVEDO, E. R. de; BONAGAMBA, T. J. The high and specific SOM contents of the Amazonian Dark Earths (ADE, Terra Preta de Índios), and their high contents of P and Ca provide high natural fertility to the soils. Char or black carbon (B C... ... |
 Author(s): NOVOTNY, E. H.; HAYES, M. H. B.; SONG, G.; AZEVEDO, E. R. de; BONAGAMBA, T. Humin, the humic fraction that is insoluble in water at all pH values, typically comprises more than 50% of soil organic matter (1). Because of the difficulties in isolation, humin compositions and pr... ... |
 Author(s): SONG, G.; NOVOTNY, E. H.; AZEVEDO, E. R. de; BONAGAMBA, T. J. The high and specific soil organic matter (SOM) contents of the Amazonian Dark Earths (Terra Preta de Índios), and their high contents of P and Ca provide high natural fertility to the soils. Biochar... ... |
 Author(s): SONG, G. X.; NOVOTNY, E. H.; HAYES, M. H. B. Maize (Zea mays, a C4 plant) stover was incubated in a long-term cultivated soil for 24 months in order to better understand the transformation of crop residues into soil organic matter. Humic fractio... ... |
 Author(s): BENTO, L. R.; OLIVEIRA, P. P. A.; PEZZOPANE, J. R. M.; BERNARDI, A. C. de C.; MAGALHÃES, A.; MILORI, D. M. B. P.; MARTIN NETO, L. Low-C-emission agriculture is essential for its sustainable growth, which aims at higher production with a low or zero C emission balance. |
 Author(s): MADARI, B. E.; LIMA, L. B.; SILVA, M. A. S.; NOVOTNY, E. H.; ALCANTARA, F. A. de; CARVALHO, M. T. M.; PETTER, F. A. Biochar incorporation into the soil is a proposed C sequestration strategy. How newly applied biochar affects C accumulation in the soil is therefore a relevant question. This study presents part of t... ... |
 Author(s): MAIA, C. M. B. de F.; FUKAMACHI, C. R. B.; PICCOLO, A.; MANGRICH, A. S. The spectroscopic characteristics (DRIFT, UV-visible and EPR) of humic fractions were studied during composting of sawdust and paper mill sludge. Infrared spectroscopy reveals a compost rich in hydrox... ... |
 Author(s): VALLADARES, G. S.; PEREIRA, M. G.; ANJOS, L. H. C. dos; BENITES, V. de M.; EBELING, A. G.; MOUTA, R. de O. Knowledge of the distribution of soil organic matter (SOM) fractions is important in managing soils toward a sustainable agricultural system ina tropical environment, However, data on Histosols in lim... ... |
 Author(s): FONSECA, E. M. da; BAPTISTA NETO, J. A.; MCALISTER, J.; SMITH, B.; FERNANDEZ, M. A.; BALIEIRO, F. C. One of the main results of the processes related to urbanization is the contamination of the adjacent water bodies. Inserted in this context, the Rodrigo de Freitas lagoon is situated in the south zon... ... |
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