gray forest soil

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June 29, 2026

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Gray forest soils, also known as gray forest soils or forest burozems, are found in deciduous forest subzones. These soils are more gray in color than podzols due to a higher organic content from fallen tree leaves and a more abundant grass cover. This increased organic matter contributes to a greater humus content, making them more fertile.1

These soils are characterized by a leaching process where organic acids from decomposing forest litter transport soluble soil components into deeper horizons. The upper horizon, composed of undecomposed quartz grains, is infertile and resembles light-gray ashes, giving rise to the name "podzols". Underneath this leached layer, a rusty brown horizon forms due to the accumulation of iron and aluminum oxides. In some areas, like western Siberia, gray forest soils support birch or aspen forests.1

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Europe
Soils
…known as degraded chernozems and gray forest soils. At best, chestnut soils—some needing only water to be productive—and, at worst, solonetzic (highly saline) soils cover areas of increasing aridity eastward of Ukraine to the Ural River. Lastly, in southern Europe, where the countryside is fragmented by mountains, plateaus, and hills,…
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…known as degraded chernozems and gray forest soils. At best, chestnut soils—some needing only water to be productive—and, at worst, solonetzic (highly saline) soils cover areas of increasing aridity eastward of Ukraine to the Ural River. Lastly, in southern Europe, where the countryside is fragmented by mountains, plateaus, and hills,…
Read More