Carbon and nitrogen ratio in the soils of the lithalsa landscapes in Sentsa River valley, East Sayan

The subject of this study is the ratio of carbon and nitrogen content in the soil of the lithalsa landscape in the Sentsa River valley. The focus is on the spatial distribution of C/N ratio in the genetic soil horizons: humus (A), illuvial (B), the parent rock(C), as well as in the buried peat horizon (T). The carbon and nitrogen content is analyzed in 70 samples using the element analyzer C, H, N, S –O EA 1110. Sample preparation included drying the soil through a sieve and grinding it with a rubber pestle in a porcelain mortar. It is found that cryogenic concentration of soil solutions, cryogenic heaving, thermokarst, zoogenic turbations, peat burial, and alluvial loam deposition are the main processes determining the peculiarity of soil formation within lithalsa landscapes. The maximum variation in the ratio of carbon and nitrogen content is observed in the illuvial horizon, while in the humus horizon and in the parent rock, as well as in the buried peat horizon, this indicator is of a smaller range.

Effectively vichoristan of the dryings of organogenic grants in the system of organizational masterry

The results of scientific researches on the cultivation of annual crops and perennial grasses in the system of organic farming on dehydrated organogenic soils are presented. Research has found that the basic conditions of growing crops in these circumstances is the water regime of the soil during the growing season in the optimal range for each crop, the use of old plowed soil organic grassland in rotation with annual crops inclusion in the structure of sown area of about 30%; sowing of grass mixtures of perennial grasses with different periods of maturation; carrying out plowing plowing on peat-glued soils with the plowing of the underlying mineral rock by 8-10 cm and enriching it with the peat horizon; introduction of growth stimulators with micronutrients such as gumysol and rubber fibers;

Late Glacial and Holocene 14 C-Dated Fossil Soils in the Middle Vistula Valley

Transformations of the natural environment in the area surrounding and encompassing the Vistula River valley during the last 20 000 years BP should be discussed with regard to radiocarbon dating of the organic matter in the documented fossil soils. Part of the 14C dates from horizons A of pedosols in the valley have already been published, for the upper part of the valley by Balwierz & Nalepka [1992], and for the lower part - by Turkowska [1992]. Palynologic analysis was also made in many of the documented sites. The most important events in the history of the valley have been supplemented by radiocarbon dating by Starkel [2001]. This report presents 14C dates measured in the buried organic horizons of fossil soils in the Middle Vistula valley between Stężyca (Dęblin area) to Liszyno (Płock area). Most datings were made in the Kampinos Forest. For mineral-organic soils the dates lie between 1080 ± 90 Gd. 19S, Laski [Urbaniak-Biernacka 1973] and 12 160 ± 260 [Gd. 4391, Mariew [Konecka-Betley 1991]. In turn, the base of the oldest peat horizon in the Kampinos Forest supplied a date of 10 S90 ± 340 Gd. 2260, Wilków [Konecka-Betley et al. 1991].

Overbank deposits of the Narrator Brook, Dartmoor, England

SummaryOverbank deposits of the Narrator Brook, exposed by the excavation of a drainage ditch, are described. The deposits, which consist of coarse (sand and gravel), fine (silt and clay) and peat units, were laid down in a floodbasin environment. The coarse units are interpreted as crevasse-splay deposits, rather than being classified as floodbasin sediments along with the fine units. Three stages of development in the evolution of the floodbasin are identified. The first stage is represented by the development of peat at a time when the area was not subjected to flooding, the second by deposition of the fine and coarse sediment units and the third by an upper peat horizon. No precise date for the formation of the deposits is at present available, but it is thought that they may be the result of man's activity in the catchment.

The occurrence of distinct prismatic & plary structures in organic soil profiles.

Prisms & plates occurring in organic soils were correlated with a deep groundwater table associated with the vicinity of a brook draining the area, sufficient thickness of the organic layer to form an impermeable reduced peat horizon preventing seepage-water from rising in the profile, or Fe coatings on the peds promoting high permeability of the oxidized peat. (Abstract retrieved from CAB Abstracts by CABI’s permission)