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Method to estimate soil macroporosity and microporosity based on sand content and bulk density Rev. Bras. Ciênc. Solo
Stolf,Rubismar; Thurler,Álvaro de Mendonça; Bacchi,Osny Oliveira Santos; Reichardt,Klaus.
Macroporosity is often used in the determination of soil compaction. Reduced macroporosity can lead to poor drainage, low root aeration and soil degradation. The aim of this study was to develop and test different models to estimate macro and microporosity efficiently, using multiple regression. Ten soils were selected within a large range of textures: sand (Sa) 0.07-0.84; silt 0.03-0.24; clay 0.13-0.78 kg kg-1 and subjected to three compaction levels (three bulk densities, BD). Two models with similar accuracy were selected, with a mean error of about 0.02 m³ m-3 (2 %). The model y = a + b.BD + c.Sa, named model 2, was selected for its simplicity to estimate Macro (Ma), Micro (Mi) or total porosity (TP): Ma = 0.693 - 0.465 BD + 0.212 Sa; Mi = 0.337 +...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Degree of compaction; Modeling; Macropore; Texture; Maximum bulk density; Relative bulk density.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000200014
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