Method to estimate soil macroporosity and microporosity based on sand content and bulk density

Abstract

SUMMARYMacroporosity 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). granulométricas -areia: 0,07-0,84; silte: 0,03-0,24; e argila: 0,13-0,78 macro = 0,465 Ds + 0,212 areia; micro = 0,337 + 0,294 areia; Pt = 1,082

Three Dimensional Characterization of Soil Macroporosity by X-Ray Microtomography

“…Non-mobilized soils are sometimes characterized by an increase in surface bulk density and reduction in MAP, especially for soils of a clayey texture (Raghavan et al, 1977;McVay et al, 2006;Abu, 2013). It is always important to mention the dependence of MAP on soil texture and bulk density (Stolf et al, 2011).…”

Determination and Evaluation of the Parameters for the Green & AMPT Infiltration Equation in Some Agricultural Soils in Mexico

“…In general, the total porosity values found are more similar to the higher limits of the intervals of total porosity in Table 2. However, although the total porosity of the samples analyzed is relatively high, the values are found within the interval described in the literature where it is mentioned that the porosity of a soil can reach up to 60 % and even that percentage can increase in presence of organic matter [35,36].…”

Sistemas de manejo do solo na recuperação de uma pastagem degradada em Rondônia

“…Terminadas as séries de leitura de RP, as amostras foram pesadas e posteriormente levadas à estufa, onde foram secas a 105 o C por 24 h, para determinar o conteúdo de água em cada tensão e a densidade do solo (Blake & Hartge, 1986 Os atributos utilizados para o estudo do grau de compactação do solo, da densidade máxima do solo (Dsmax) e da densidade relativa do solo (Dsrel) foram estimados a partir dos dados de densidade do solo (Ds, Mg m -3 ) e areia total (kg kg -1 ), de acordo com Stolf et al (2011). A densidade máxima do solo foi obtida pela equação Dsmax = 1,49 + (0,456 x areia total) e a densidade relativa, por Dsrel = (Ds/Dsmax) x 100.…”