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29

Species or

genus

Soil characteristics

Ecological

characteristics

Benefits

Notes

(optimum pH > 6);

it can grew on

pioneers and also

clayey soils, but

well drained.

absorbing

function.

Good

ability

to

colonize

post

-

agricultural

lands.

Low

degree

of

allergenicity of pollen.

Quercus robur

It likes deep, fresh,

fertile from sub-acid

to subalcaline soils,

with good water

availability

throughout the year,

even

with

the

surface water table;

It shuns those too

compact.

Temperate species, in

the

Mediterranean

climate it’s limited to

alluvial areas.

Long-lived

species

with relatively rapid

growth than other

oaks.

Low

degree

of

allergenicity of pollen.

In its natural state

in the Campagna

Romana

is

confined to areas

with high water

table or wet for

much of the year.

Salix alba

Indifferent to the pH

it needs of soils with

good

water

availability

throughout the year.

Typically

riparian

species.

Fast-growing species

suitable

for

installations in the

vicinity

of

watercourses.

Tolerates

air

pollution. Low degree

of allergenicity of

pollen.

Not recommended

for cultivation in

the vicinity of

buildings or duct

systems, that can

be damaged by the

roots.

Sorbus

domestica

The best conditions

for

growth

are

offered by basic,

deep

and

rich

texture soils.

It is

widespread

mainly in the range

of thermophilic sub-

Mediterranean oaks.

Conducive to animal

biodiversity.

Ulmus minor

Fertile and never

very dry soils.

Mesophilic and also

ruderal

areas

(embankments

of

infrastructure).

Effective in mitigating

both acoustic and

atmospheric pollution.

Sensitive to Dutch

elm disease.