@article{fdi:010041416,
  title = {{C}ompressibilidade de agregados de um latossolo amarelo da {A}mazõnia em resposta ao potencial da agua do solo},
  author = {{F}ilho, {J}.{T}. and {G}rimaldi, {M}ichel and {T}essier, {D}.},
  editor = {},
  language = {{POR}},
  abstract = {{T}he agricultural use of soils usually relies on the use of heavy machinery that cause soil compaction, affecting the amount of air and water available for plants. {T}he present study was carried out in the year 2000 and aimed at studying the performance of aggregates of an {A}mazon {O}xisol under mechanical compression and that were subjected to varying degrees of matric potential. {H}umid and undisturbed tropical forest soil samples were collected from the {A} horizon (10 cm deep) and {B} horizon (150 cm deep). {I}n the laboratory, the samples were broken into fragments and sieved to obtain 2 to 3 mm aggregates, which were placed in equilibrium under four matric potentials. {T}hereafter, they were exposed to uni-dimensional compression with pressures varying from 32 to 1.000 k{P}a. {T}he highest compressibility of the aggregates for horizon {A} as well as for horizon {B} was observed for a matric potential of -32 k{P}a (soil moisture of 0.38 kg kg(-1)), and the lowest for the potentials of -1 k{P}a and -1.000 k{P}a (soil moistures of 0.32 and 0.30 kg kg(-1) respectively), indicating that the soil should not be managed when moisture approximates 0.38 kg kg(-1). {T}he largest reduction in aggregate volume occurred under a mechanical pressure below 400 k{P}a. {T}his indicates that these soils are quite prone to compaction, specially the aggregates of the {A} horizon (10 cm), possibly because of better structural conditions owing to the higher organic matter content.},
  keywords = {edometric assay ; empty index ; total porosity ; soil compression ; soil compaction ; {BRESIL} ; {AMAZONIE}},
  booktitle = {},
  journal = {{R}evista {B}rasileira de {C}iencia do {S}olo},
  volume = {29},
  numero = {4},
  pages = {489--495},
  ISSN = {0100-0683},
  year = {2005},
  URL = {https://www.documentation.ird.fr/hor/fdi:010041416},
}