Soil characteristics
The soil of the Brda region are composed of ocean sediment mass. After the
sea disappeared layers of flysh, sandstone and limestone remained. Surface
waters cut deeply into the soil and it is the erosion to thank for the hilly
surface. This type of soil is very difficult to cultivate. It is poor with
organic and mineral substances, phosphorous, potassium and other nutrients.
It is typical vinicultural soil (Drnovšček, 1994).
It is the marlstone which provides the best basis for high quality
wines.
At first, the soil is rich in limestone but under the influence of the sun
and rain it decomposed and thus sandy clayous soil came into being. During
decomposition, the limestone is washed out. Form slightly alkaline the soil
becomes neutral which is a prerequisite for the growth of vine. The soil is
mainly shallow. It is deepened only if ploughed (regosol) and since it is not
compact it is often erosion-prone. It is grown with rare autochthonous oaks,
hornbeams and ash trees. (Drnovšček, 1994).
Pedological chart (types of soil) of the Goriška Brda winegrowing
region
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70% brown carbonated limy soil
20% rendzina / lime soil
10% washed out carbonated limy soil |
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50% euthric brown soil / ocean flysh, marlstones mixed with limy breccias
30% ranker euthric regolythic soil
20% euthric brown soil / flysh, marlstone mixed with limestone |
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80% euthric brown soil / ocean flysh
20% rendzina / flysh, sprsteninasta rendzina |
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60% euthric brown soil / ocean flysh
40% euthric brown soil / ocean flysh, anthropogenic soil |
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80% euthric brown soil / coherent alluvial deposit
20% euthric brown soil / alluvial pseudogley |
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80% euthric deeply gleyed fluvisoil
20% euthric clayous fluvisoil |
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70% rendzina / limy, sprsteninasta soil
30% brown carbonated soil / limy soil |
Examples of the Brda region marlstone
The pictures show several examples of the Brda marlstone, the prevailing compound
of the soil.
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