Soil Resources of European Volcanic Systems


Volcano di Vico - November 1998

Date of description: 21-11-1998

Authors: A.G. Jongmans, and F. van   Oort 

Volcano di Vico, monte Venere, north of Rome, Italy

 700 m


Map number and Coordinates: 
             U.T.M. 33T TG 682 914

Classification:   Typic Hapludand

Click on image to enlarge


  Soil Climate: Mesic temperature regime, ann temp.: 11.8 o C ; Udic moisture regime, ann prec. 1670 mm
  Topography: Steeply dissected
  Landform: Hill, Volcano
  Land element: Slope,

Position: Upper slope
  Slope: Steep , 30-60%
Form: Straight
  Landuse/Vegetation: Forest: dominantly oak (quercus cerris) with maple, blackberry, ivy (hedera); bracken, honeysuckle, grass.
  Human influences: Forest lane cut, a road is situated 20 m above the profile pit
  Parent material: Lava, tephritic-phonolitic with leucite
  Effective soil depth: Deep
  Erosion: Frequently fresh rock fragments (stones) at the soil surface
  Drainage class: Well drained
  Internal drainage: Rapid


External drainage: Rapid runoff


Moisture conditions: Slightly moist


O: -2-0 cm: Ol –2 - -1.5 cm , fresh litter; -1.5 – 0 cm, partly decomposed organic matter; abrupt and smooth to:
A1: 0-8 cm; 10 YR 2/2; silt loam, very few ,fine gravel, partly altered; strong, very fine angular blocky structure ; very friable; pores not detectable; many fine, few medium roots; clear and smooth to:
A2: 8-25 cm: 7.5 YR 2/0; silt loam, very few fine to coarse gravel, both fresh and weathered; 20% subrounded pockets with strong fine granular structure, rest groundmass has no macro structure; friable; few fine biopores; many fine, few medium and coarse roots; clear and smooth to:
A3: 25-43 cm: 10 YR 2/2; silt loam, few fine to coarse fresh and altered gravel, subrounded; very weak, fine, subangular blocky structure, pockets with strong fine granular structure; friable; common fine biopores; many very fine, few medium and coarse roots, clear and smooth to:
Bw1: 43-70 cm; 10 YR 4/6 subrounded pockets of 1-2 cm consisting of A3 material; sandy loam, common, fine to coarse gravel ,partly weathered showing weathering rinds; weak, fine subangular structure, locally pedotubules filled with organo-matric fecal pellets; friable; many fine biopores; many fine, few medium and coarse roots; gradual and smooth to:
Bw2: 70-105/140 cm; 10YR 5/6; sandy loam, many fine to coarse subrounded gravel, partly weathered; weak fine subangular blocky structure; friable; many fine biopores; common fine, few, medium and coarse roots; clear and wavy to:
C: 105/140-180cm; Dark colored, fine textured, blocky lava with vacuoles filled with white leucite crystals/ zeolites; the lava is breakable into smaller entities (physical weathering);vertical elongated fissures up to 5 cm, occur ,filled with loamy sand, 10 YR 6/6; in the fissures fine and medium roots are present.

Last modified 13 May 2002 by EG