Spodosol


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Spodosol

[′späd·ə‚sȯl]
(geology)
A soil order characterized by accumulations of amorphous materials in subsurface horizons.
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Dahlgren RA, Ugolini FC (1989) Aluminum fractionation of soil solutions from unperturbed and tephra-treated Spodosols, Cascade Range, Washington, USA.
Most (75%) sugarcane in Florida is grown on histosols (referred to as muck soils), while the remainder is grown in a mixture of spodosols, alfisols, and entisols (referred to as sandy soils) that are typical of the flatwoods of central and southern Florida.
Typical profile: A- Bo (or Bv)- C Spodosol Light colored, acid coarse soils, typically Forest, under coniferous forest.
of type Climate texture sites plots Soil orders Broadleaf nontropical sandy 3 16 Inceptisol, Spodosol nonsandy 17 97 Alfisol, Histosol, In- (5) (32) ceptisol, Spodosol (Alfisol, Histosol, Spodosol) tropical sandy 4 24 Alfisol, Oxisol, Ulti- sol nonsandy 10 50 Inceptisol, Oxisol, (3) (10) Ultisol, Vertisol (Oxisol, Ultisol) Needle-leaf sandy 11 56 Inceptisol, Spodosol nonsandy 9 40 Alfisol, Inceptisol, Spodosol, Ultisol Forest type Disturbances [+] Broadleaf CL, F A, CL, F, HT (CL, F) A, CB A, CB, P (A, CB) Needle-leaf F CL, F Notes: For broadleaf stands, we defined regions with a coldest-month mean temperature of [less than]18[degrees]C as nontropical and regions with mean temperatures of all months [greater than]18[degrees]C as tropical.
The root densities in most forests considered by Gower (300-700 g/[m.sup.2]) are much smaller than the 4900 and 8300 g/[m.sup.2] ([less than]6 mm diameter), respectively, reported in the top 50 cm of forests on an exceedingly leached oxisol and on a spodosol in the Venezuelan Amazonas (Klinge and Herrera 1978, 1983, Uhl and Jordan 1984).
Ingvar Nilsson S, Andersson S, Valeur I, Persson T, Bergholm J, Wiren A (2001) Influence of dolomite lime on leaching and storage of C, N and S in a Spodosol under Norway spruce (Picea abies (L.) Karst.).
BISEQUAL SPODOSOL PROFILE ON TRAIL RIDGE IN SOUTHEASTERN GEORGIA, Donald M.
However, virulence and persistence of Steinernema riobrave (Cabanillas, Poinar & Raulston) and Heterorhabditis bacteriophora Poinar appeared to improve in a higher clay-content Entisol when compared to a sandy Spodosol and a sandy Entisol (Shapiro et al.
Interaction of the earthworm Diptocardia mississippiensis with microbial and nutrient dynamics in a subtropical spodosol. Soil Biol.
Forage production and N contents, and soil changes during 25 years of continuous white clover-Pensacola bahiagrass growth on a Florida spodosol. Agronomy Journal 71:795-798.
Grierson PF, Comerford NB, Kolela EJ (1998) Phosphorus mineralization kinetics and response of microbial phosphorus to drying and rewetting in a Florida spodosol. Soil Biology & Biochemistry 30, 1323-1331.
G Sulfur fertilization of Bahiagrass with varying levels of nitrogen fertilization on a Florida Spodosol. Agronomy Journal, v.97, p.661-667, 2005.