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Estimating subsoil resistance to nitrate leaching from easily measurable pedological properties Rev. Bras. Ciênc. Solo
Nakagawa,Fábio Keiti; Forti,Gabriel Benjamin Siqueira; Alves,Marcelo Eduardo; Lavorenti,Arquimedes; Miranda,Jarbas Honório de.
Leaching of nitrate (NO3-) can increase the groundwater concentration of this anion and reduce the agronomical effectiveness of nitrogen fertilizers. The main soil property inversely related to NO3- leaching is the anion exchange capacity (AEC), whose determination is however too time-consuming for being carried out in soil testing laboratories. For this reason, this study evaluated if more easily measurable soil properties could be used to estimate the resistance of subsoils to NO3- leaching. Samples from the subsurface layer (20-40 cm) of 24 representative soils of São Paulo State were characterized for particle-size distribution and for chemical and electrochemical properties. The subsoil content of adsorbed NO3- was calculated from the difference...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anion exchange capacity; Remaining phosphorus; Retardation factor.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000500013
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