On soil genesis in temperate humid climate: VI. The formation of a Glossudalf In loess

Bouma, J.; Pons, L.J.; Schuylenborgh, J.V.n

Netherlands Journal of Agricultural Science 16(1): 58-70


ISSN/ISBN: 0028-2928
Accession: 025146409

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An in the South of the Netherlands frequently occurring type of a well-drained Grey Brown Podzolic Soil was investigated by chemical and macro- and micromorphological methods. The profile is considered to be a Holocene soil formation in originally calcareous wind deposits (loess). Under the infiltration conditions as found in flat positions, the continuing development of the textural B-horizon leads to a polygonal cracking in dry periods. In the wet season these cracks conduct water, saturating the surroundings of the cracks. Reduction processes come into play leading to a bleaching. Consequently, in vertical sections of the soil light colored tongues are observed bordered with a yellowish red band and at some distance manganese mottles and concretions. In the tongues strong clay leaching occurs. The largest amount of micro-morphologically determined oriented clay bodies (notably channel and ped argillans) was found in the B3-horizon, whereas the B2+-horizon had the highest clay content. The classification of the profile as an Aquic Glossudalf was based on the discussion of chemical and morphological data.