Foreste urbane: il respiro delle città Synergies

Layer Depth

pH H2O pH KCl tot. CaCO3

%

org. C tot. N C:N

av_P

mg kg-1 cm % %

Topsoil 0 - 40 5,3 4,2 0,0 1,22 0,10 12,12 22,69

Subsoil 40 - 80 5,5 4,3 0,0 0,59 0,06 9,11 17,23

Layer Depth Cation exchange complex (cmol(+) kg-1) BS

cm CEC Ca2+ Mg2+ Na+ K+ %

Topsoil 0 - 40 15,31 1,50 0,26 0,08 0,09 12,61

Subsoil 40 - 80 12,88 2,37 0,37 0,06 0,09 22,43

Layer

Depth Particle size % Text.

class

USDA

cm Coarse

sand

Fine

sand

Total

sand

Coarse

silt Fine silt Total silt Clay

Topsoil 0 - 40 29,3 12,3 41,6 17,4 31,7 49,1 9,3 Loam

Subsoil 40 - 80 26,0 14,6 40,6 14,1 28,0 42,1 17,3 Loam

Analytical data for topsoil and subsoil (mixed samples)

Characteristic Topsoil Topsoil+Subsoil

Thickness deep

Rock fragments common frequent

Texture loam loam

Reaction strongly acid strongly acid

Carbonates not calcareous not calcareous

CEC – Cation Exchange Capacity medium medium

Exchangeable Ca very low very low

Exchangeable Mg very low very low

Exchangeable K very low low

BS - Base Saturation very low very low

Organic C medium low

Total N medium low

C:N ratio high high

Mg:K ratio balanced balanced

Available P high medium

Selvicultural evaluation

(topsoil and subsoil)

Property Topsoil Topsoil + Subsoil

Humus form

(Réferéntiel Pédologique 2008)

Mesomull peu acide

mésosaturée

Cracking aptitude not present

Structure stability very unstable very unstable

Asphyxia risk from low to medium from low to medium

Plasticity very little plastic very little plastic

Crusting risk high

AWC – Available Water Capacity

(according to Saxton – USDA ARS) 58 mm 76 mm

Selvicultural evaluation

(topsoil and subsoil)

Soil Water Balance

Soil Water Balance