Soil aggregate formation and stabilization as influenced by wetting drying cycles and organic compounds with different hydrophobic characteristics
01/Feb/2005
The input of organic compounds in agriculture and the soil wetting and drying cycles have a strong influence on soil aggregation. This study investigated the effect of incubation periods and the influence of wetting and drying cycles with the addition of organic compounds of distinct hydrophobic and hydrophilic characteristics on the aggregation of a Red-Yellow Latosol. The experiments were arranged in an incomplete factorial design 2 x 3[(4-1) + (4-1)]. The factors were: air-dried soil of A and B horizons, three incubation periods (40, […]
Soils as indicators of the relationships between continental and marine sediments on the coastal plain: Rio Guaratuba (SP)
01/Mar/2001
Two toposequences on the coastal plain of Rio Guaratuba (SP) were studied to define the pedological and deposition/storage evolution by means of macromorphological soil analysis. The first sequence shows the change of a Podzol into organic soil on marine sandy sediments, whereas the second one shows the relationship of a Gley Soil on continental sediments with a Podzol soil on marine sediments. Marine sedimentation was found to form sandbanks with internal depression zones, which allowed the development of a Podzol […]