The soil of the experimental area was classified as typical orthic Neossolo Quartzarenico (Psamment
), with moderate A horizon, hyper-xerophilous caatinga vegetation, and predominant flat relief, according to EMBRAPA (2014).
The soil of the study area was classified as a "Neossolo Quartzarenico ortico tipico" (EMBRAPA, 2013) or Psamment
(Soil Survey Staff 2014).
The sandy-textured soil is classified as a typic Xeric Psamment
(McArthur 1991) and contained 94% sand, 4.5% clay, 1.5% silt, 0.06% N, and 0.66% C.
The soil at the tropical semi-deciduous forest is a psamment
, for instance, is a suborder of Entisols that is highly sandy.
(1997) reported that at the Ohio Management Systems Evaluation Areas in southern Ohio, yields were significantly lower in a portion of a field with Psamment
sandy loam and leaching of nitrate out of the root zone was higher.
Topsoil (0-0.2 m) and the subsoil (0.2-1.5 m) were classified as Tenolsols (Isbell 1996), yellow siliceous sand (McArthur 1991), Typic Xeric Psamment
(Soil Survey Staff 1987), and Uc5.22 (Northcote 1979).
(1998) as Tenolsols (Isbell 1996); yellow siliceous sand (McArthur 1991); Typic Xeric Psamment
(Soil Survey Staff 1987); Uc5.22 (Northcote 1979).
The soil type used was a deep yellow loamy sand (Uc5.11, Northcote 1974; USDA typic Xeric Psamment
) with 0.7% total soil C, 0.06% total soil N, 4% clay, cation exchange capacity of 2 cmol/kg, and pH of 5.1 (1:1 soil to water) in the upper 10 cm.
The soil is `excessively drained dune sand' and classified as a Psamment
(Soil Survey Staff 1992) and typically has 3-6% C and 0.13-0.21% total N at a depth of 0-5 cm, with pH 5.1-5.5 (Yeates 1995).