Relating aerial erosion, soil erosion and sub-soil erosion to the evolution of Lunan Stone forest, China
Carbon dioxide ; Carbonate rock ; China ; Karst ; Karstification ; Model ; Soil erosion ; Soil water ; Yunnan
Stone forest is a unique karst landform with a complex evolution process. This paper will focus on stone pillars, the basic component of stone forest, analyse different combinations of sub-aerial, soil, and sub-soil erosion in Lunan Stone Forest
area, and propose a Triplex erosion mechanism for stone forest evolution.
Effect of fire on soil, rice, weeds and forest regrowth in a rain forest zone (Côte d'Ivoire)
Agricultural practice ; Agropedology ; Fire ; Forest ; Geochemistry ; Ivory Coast ; Rice ; Soil ; Soil properties
Forest, soil, rice, weeds and regrowth were studied in the fields off local farmers in permanent plots during 2-5 years. The fields covered all currently cultivated soil types and forest types. This study is concerned with the full shifting
wildfire at the end of summer 1988. The results suggest that light and moderate forest fires may increase soil fertility without cousing a marked difference in soil runoff and erosion.
Detailed measurements of soil nutrients, runoff and sediment discharge were made in two plots about 200 m2 each in a plantation of Aleppo and Brutia Pine in the Mediterranean climatic region of Israel. One of the plots was affected by a moderate
The role of termites in soil formation in the tropical semi-deciduous forest zone, Ghana
Biogenic process ; Catena ; Deciduous forest ; Forest ; Ghana ; Pedogenesis ; Soil properties ; Tropical zone
The aim of this paper is to demonstrate the role of termites as soil forming agent in the tropical semi-deciduous forest. This is done by describing soil profiles, and by analysing soil samples from the soil profiles as well as soil material
The soils were surveyed, described and examined at a remote forested high-elevation site of the Bavarian Forest (Germany). They derive from periglacial gneiss debris consisting of an upper, loose stratum and an indurated zone below. The different
hydraulic conductivity of both layers has important effects on the dynamics of water and nutrient elements, and thus on soil development.
Ecological studies of mixed forests in Nopporo National Forest, Central Hokkaido, Japan. Relations between the distribution of aged forests and environmental factors
In Nopporo National Forest, thirteen forest communities which were determined by dominant species and three soil types were observed. - (SGA)
Soil degradation from converting forest land into agriculture in the Chitavan district of Nepal
Soil fertility decreased when forest land was converted to agriculture. But soil conditions under forested land use were not always of the best quality. - (DWG)
Vegetation chronosequence in Hong Kong : soil properties and successional development
Chronosequence ; Climax ; Forest ; Grassland ; Hong Kong ; Soil ; Soil properties ; Vegetation
The soil properties of a vegetation chronosequence in Hong Kong involving a grassland, a 22-year mixed woodland, a 52-year forest and 2 graduation 150-year old climax (feng shui) forests were examined. All the 3 hypotheses tested are rejected. While
the feng shui forests differed markedly in soil properties, exotic species were superior to native species in soil amelioration. There was no accumulation of organic carbon, nitrogen and cation nutrients with ecological succession, due to the influence
Soil CO2 concentration and microclimatic parameters were measured at a primary forest and grassland in dry season (August to September 2003) and rainy season (March 2004) in central Amazonia in order to investigate the effects of infiltration
of rainfall and evaporation of soil water upon the changes in soil CO2. Fieldwark was carried out in the vicinity of Novo Aripuana City in the Brazilian State of Amazonas.
A mixed Quercus-Tilia forest was investigated to study the soil development in a forest that resembled the natural Danish forest composition before 4000 BC. The results indicate that the oak-lime type of forest prevents or retards podzolization
under the present Danish edaphic and climatic conditions. pH data of surface soil showed a decrease of 0.7-0.9 units within the last 50 years, which suggests that the present soil development might change rapidly due to soil acidification.
The effects of 2 fire intensities on soil microbial biomass and soil respiration were measured in a field-scale experiment on a sweet chestnut forest slope in St. Antonino, southern Switzerland. 20 hours after a higher intensity fire on a slope
with double fuel load, soil respiration had increased and remained high for several months. The AA. suggest that this would increase the risk of nutrient outwash from the burnt slope. However, the size of the microbial biomass was unchanged compared to unburnt
control sites. Soil microbial biomass therefore played no significant role in limiting nutrient losses after the fire.
Struktura pudniho fondu v CSR. (Structure of soil fund in the Czech Socialist Republic)
A survey of soil fund structure in the CSR for the height soil zones of hydromorphic soils, chernozems, brown soils, illimeric podzol soils, brown forestsoils and mountain podzol soils. (MS).
A Tolnai-dombsag genetikai talajtipusai és talajlepusztulasa. (Genetic soil types and soil erosion in the Tolna Hills)
The loess covered and minutely dissected hilly region of high relief is described by various soil types (brown forestsoils, chernozem brown soils, chernozems, earthy barren grounds, hydromorphous soils). Surfaces are classified according
Agricultural practice ; Belgium ; Land use ; Soil ; Soil property
Study of effects of three chronobiosequences (forest-forest (BB), forest-meadow (BP), forest-culture-forest (BCB)) on soil chemical properties. After 70-80 years of forest stand, BCB still exhibits, in surface layer, traces of previous decades
Gray Forestsoils, Alluvial Sod-Podzolic and Alluvial Gray Forest residual-sod soils, Alluvial Pseudopodzolic (Pseudogley) soils, Alluvial Sod-Podzolic soils, and Alluvial Gray Forestsoils. Classification and nomenclature of these soils should take
Field and modern analytical methods have shown that Floodplain soils with a pronounced A2 horizon are a large group of soils that occur under various ecologic conditions. They include Alluvial Sod Acid and Meadow Acid residual podzolized or residual
into account their ecology and formation history as well as their morphology. Floodplain soils with a differentiated profile, formed dominantly by eluvial-gley and lessivage, are the dominant soils in this group.―(L'Ed.).
In order to evaluate the soil loss in a burnt forest and the role played by slope orientation in erosion, a study has been carried out in the Montserrat area (NE Spain) affected by a fire in summer 1986.
Biogéochimie ; British Columbia ; Canada ; Exploitation forestière ; Forêt ; Lessivage ; Parcelle expérimentale ; Podzol ; Propriétés du sol ; Roberts Creek Forest ; Sol
This study investigates the effects of conventional clear-cutting on soil chemistry in Podzols of Roberts Creek Study Forest. The AA. measured forest floor composition, soil pH and salt-extractable ions concentrations in undisturbed forested stands
) and dispersion parameters (differences in variance between treatments). They found that forest floors of harvested plots had lower phosphorus and potassium concentrations than control plots. It is highlighted that clear-cutting was not associated with strong soil
(control plots), stands harvested 2 to 5 years prior to sampling (cleared plots) and stands harvested 8 to 15 years prior to sampling (regenerating plots). They focused on the effects of forest harvest both on mean (differences in average values
[b1] Soil Water Lab., Univ. of British Columbia, Vancouver, Canada
[b2] Vancouver Forest Region, BC Ministry of Forests, Nanaimo, Canada
Lunan stone forest is a kind of typical karst in China, which is mainly developed under red soil. In the winter of 1999, 3 study sites were chosen according to vegetation cover, geomorphologic location and soil types to measure CO2 concentration
. The AA. mainly study the relationship between soil CO2 concentration and the amount of microorganisms in soil and tries to develop a preliminary model to predict the soil CO2 concentration.
The forest of the Western Carpathians are important in protecting the soil and water resources of Slovakia and neighboring countries. Although the forest acreage has increased more than 10% during the last 40 years, the condition of the forests
(mainly mixed stands of spruce, fir, and beech) has deteriorated markedly. The main problems are drought and subsequent insect attack, soil acidification, and air pollution. A. discuss reclamation experiments in the municipal spruce forest of Nálepkovo