Revista Brasileira de Ciência do Solo
On-line version ISSN 1806-9657
SOUZA, Zigomar Menezes de; MARQUES JUNIOR, José; PEREIRA, Gener Tadeu and SAENZ, Carolina Maria Sánchez. Spatial variability of aggregate stability in latosols under sugarcane. Rev. Bras. Ciênc. Solo [online]. 2009, vol.33, n.2, pp.245-253. ISSN 1806-9657. http://dx.doi.org/10.1590/S0100-06832009000200002.
The spatial variability of soils under a same management system is differentiated, as expressed in the properties. The spatial variability of aggregate stability of a eutrophic Red Latosol (ERL) and a dystrophic Red Latosol (DRL) under sugarcane was characterized. Samples were collected in a regular 10 m grid, in the layers 0.0-0.2 and 0.2-0.4 m, with 100 points per area, and the following properties were determined: geometric mean diameter (GMD) of aggregates, mean weight diameter (MWD) of aggregates, percent of aggregates in the > 2.0 mm class and organic matter (OM) content. The eutrophic Red Latosol (ERL) had a higher aggregate stability thn the dystrophic Red Latosol (DRL), which may be attributed to the higher clay and OM content and the gibbsitic mineralogy of this soil class. The differentiated evolution of the studied Oxisols explains the wider range and lower variation coefficient and variability, for all properties studied in the eutrophic Red Latosol.
Keywords : spatial distribution; physical properties; organic matter; Saccharum officinarum.