The soil cover on a gentle watershed slope under conditions of the recent seasonal soil overwetting in the Kamennaya Steppe area |
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| Authors: | N B Khitrov Yu I Cheverdin L V Rogovneva |
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| Institution: | 1.Dokuchaev Soil Science Institute,Moscow,Russia;2.Dokuchaev Research Institute of Agriculture of the Central Chernozemic Region,p.o. Dokuchaev Institute,Voronezh oblast,Russia |
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| Abstract: | The soil cover pattern on a gentle watershed slope at the Kamennaya Steppe Experimental Farm consists of the areas of typical
chernozems, zooturbated chernozems, and leached chernozems evolving into chernozemic-meadow soils; they are oriented along
the slope. This soil combination is complicated by the presence of slightly eroded and slightly saline soils. The seasonal
overwetting and inundation of the soils are favored by the discharge of the groundwater above the local aquiclude represented
by the layer of dark brown calcareous clay at the depth of 1.0–2.2 m from the soil surface and by the concentration of snowmelt
runoff in the concave parts of the slope. Seasonal overwetting of the soils leads to the appearance of olive tints and small
iron concretions (quasigley features) in the lower horizons; in some cases, proper gley features (bluish coatings) appear
in the chernozems. The veinlets of powdery gypsum are formed in the middle-profile horizons of some soils. Salt efflorescence
on the surface in some places is also the result of the seasonal overwetting of the soils followed by their intense drying
upon the hot and droughty weather conditions. |
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