Biomass (Mg/ha) Below- Above- Forest type Total ground ground "Guaco" forest on grey ultisol 465 42 423 Mixed forest on oxisol (K-, Ca-, and Mg- 310 (a) 49 261 starved) [+] 292 (b) 57 234 Tall caatinga on spodosol
356 119 237 (N-starved) [+],[++] Short caatinga [ss] 310 128 182 Root mass Forest type fraction "Guaco" forest on grey ultisol 0.09 Mixed forest on oxisol (K-, Ca-, and Mg- 0.16 starved) [+] 0.20 Tall caatinga on spodosol
0.33 (N-starved) [+],[++] Short caatinga [ss] 0.41 (+.)These forests are also very short on P (Coomes 1997).
Dahlgren R, Walker W (1993) Aluminum release rates from selected Spodosol
Bs horizons--effect of pH and solid-phase aluminum pools.
With regard to development, the soil ranges from an A-C profile (Entisol) to a weakly developed Spodosol
. Given the brief length of time that this surface was subject to pedogenesis, soils at several of the locations appear to have developed at a remarkably rapid rate.
Comerford, "Surface soil carbon size-density fractions altered by loblolly pine families and forest management intensity for a Spodosol
in the southeastern US," Plant and Soil, vol.
Podzol (Chapter 3)--A term used in some taxonomic systems that is equivalent to Spodosol
The basal soil in the northern part of the study area is a peat layer that gives way southward to a Spodosol
. Radiocarbon dates indicate that peat accumulation began in a wetland at 6170-5750 cal.
This process is called podzolization and the resulting soil will be a podzol with an O A E Bh ir type profile (equivalent to a spodosol
in the STS system).
According to US Soil Taxonomy (Soil Survey Staff 1999) the soils are classified as Sulfaquent (mangrove), Spodosol
(restinga) and Inceptisol (Atlantic forest).
Van Rees KCJ, Comerford NB (1986) Vertical root distribution and strontium uptake of a slash pine stand on a Florida Spodosol
. Soil Science Society of America Journal 50, 1042-1046.
An extended period of stability is represented by a moderately developed spodosol
with an A/B/C horizonation.
Solution/soil ratio and release of cations and acidity from spodosol
Ussiri DA, Johnson CE (2004) Sorption of organic carbon fractions by spodosol