Brown Forest Soils

Brown Forest Soils

 

soils formed under mixed broad-leaved or, less frequently, coniferous forests under conditions of a temperate, warm, moist climate on soil-forming rocks of various origin and mechanical composition. The soils are usually distinguished by their brown color and lumpy, nutty texture. In cross section, brown forest soils are divided into A0, a layer of forest litter 2-5 cm thick; A1, a humus layer 15-20 cm thick (occasionally up to 30 cm thick); and B, the lower layer of maximum loam (15-40 cm thick). The greatest quantity of humus (6-10 percent) is contained in the humus layer. The acidity and degree of saturation with bases of brown forest soils depend on their geographic position; a more acidic reaction of such soils is found in southern regions. Brown forest soils are further subdivided into typical (saturated or unsaturated with bases and residually carbonaceous), podzolized, and gley (surface gley or pseudopodzolic) soils. Brown forest soils are found in western and central Europe, in the northwestern USA, in China, and in Korea. In the USSR they are found in the Carpathians, the Crimea, the Caucasus, and the southern part of the Far East. High yields of tobacco, grapes, tea, and other crops can be grown on brown forest soils, which also have great value for forestry.

IU. A. LIVEROVSKII

References in periodicals archive ?
The first 104 m of this shelterbelt is located on mineral soils (division: autogenic soils, order: brown forest soils, type: hapludalfs, subtypes: glossudalfs and ochraqualfs) and the next 104-125 m on mineral-organic soils (division: hydrogenic soils, order: post-bog soils, type: mucky soils, subtype: muckous soils) (Table 1).
This area comprises 6 soil subgroups: brown forest soils, brown forest soils with gleyed B and C horizons, iron podzols, peaty podzols (with thin iron pan), non-calcareous gleys, and peaty gleys.
The brown forest soils are found primarily in the central region of the island, and are derived from raised limestone coral.
In general the brown forest soils and deeper regosols would have been suitable for growing wheat and barley.
Nakaya (1982) found that the repellency of 4 unspecified Japanese brown forest soils increased to some extent after heating to 105 < T < 200[degrees]C, increased steeply for 200 < T < 250[degrees]C, and declined for T > 250[degrees]C.
Similar freely-drained brown forest soils beneath Neolithic earthworks in east central Scotland have been identified at Dalladies and North Mains by Romans and his co-workers (Romans et al.
Firstly, the juxtaposition of brown forest soil and podsol features in two lower samples (the layer marked 'x' on [ILLUSTRATION FOR FIGURE 6 OMITTED]) suggests that the existing brown forest soils were being podsolized.
The Type 1 soils represent the buried land surface, a brown forest soil that would have supported a deciduous woodland vegetation cover.
The soils were regrading back towards a brown forest soil after disruption by burning, although this process was not complete by the time the bank was built.