Here the AA. report data from a reconnaissance survey of soil phosphorus fractions for contrasting soil types under lowland tropical forest on Barro Colorado Island, Republic of Panama. These soils have developed under uniform vegetation and climate
, but on contrasting lithology and topography, so they are subject to distinct mineralogy and weathering regimes. By studying these soils, the AA. aimed to explore the extent to which soil phosphorus fractions and phosphorus availability vary with local-scale
Phosphorus content in five representative landscape units of the Lomas de Arequipa (Atacama Desert-Peru)
The AA. consider some general soil characteristics and they emphasize the different forms of phosphorus in soils of 5 representative vegetation types (Lomas types) of Lomas de Arequipa. Hypothesis of a close relationship between labile phosphorus
The effect of various sources and dose of phosphorus on residual soil test phosphorus in different soils
Agropedology ; Comparative study ; Experimentation ; Kansas ; Phosphorus ; Pollution ; Soil improvement ; Soil properties ; United States of America
Soil test phosphorus (STP) finds its agronomic utility for the recommendation of phosphorus (P) fertilizer to crops and in risk assessment of offsite soil P movement from an environmental perspective. The aim of this research was to understand
the influence of P from several P sources applied on Soil test phosphorus (STP) in 6 different soils both before crop P removal (NBP0) and after the first (NBP1) and seventh harvest (NBP7) of corn (Zea mays L.). The P was extracted with Bray1 solution from
Reducing nitrogen and phosphorus losses from arable slope land with contour hedgerows and perennial alfalfa mulching in Three Gorges Area, China
Agricultural practice ; Agropedology ; China ; Comparative study ; Erosion control ; Experiment plot ; Geochemistry ; Hubei ; Nitrogen ; Phosphorus ; Precipitation ; Rill wash ; Sediment budget ; Soil erosion ; Water erosion
The loss of nitrogen and phosphorus from arable slope land threatens the aquatic environment in the Three Gorges Area, China, and the protection of these slopes will play an important role in regional agricultural development. During the last 10
years, a long-term comparison of ecological methods to reduce losses of nitrogen and phosphorus has been carried out with 5 treatments. Rainfall (P), runoff, rainfall intensities (I10, I20, I30, I60), sediment yield, and nitrogen and phosphorus losses
with toon contour hedgerows could effectively reduce runoff, sediment yield and losses of nitrogen and phosphorus from arable slope land. The reductions of sediment yield and losses of nitrogen and phosphorus increased with the increase of rainfall
The load of organic carbon, nitrogen and phosphorus from two large drainage basins (River Kitka and River Oulanka) in NE Finland
The aim of this paper is to quantify the load of organic carbon, nitrogen and phosphorus from 2 large catchment areas, the River Kitka and the River Oulanka, and the transport of the nutrients into Lake Paanajärvi, a deep oligotrophic lake in NW
Pedogenic gradients for iron and aluminium accumulation and phosphorus depletion in arctic and alpine soils as a function of time and climate
The AA. compare the trends with time of pedogenically important extracts of iron, aluminium, and phosphorus in relatively extreme environments of high latitude and altitude. They focus on soils of Baffin Island (eastern Canada), the Sierra Nevada
Lake Sobygaard, Denmark : a shallow lake in recovery after a reduction in phosphorus loading in Shallow lakes environment. (L'environnement des lacs eutrophes)
Spatial correlation between the composition of the clay fraction and contents of available phosphorus of an Oxisol at hillslope scale
Brazil ; Clay mineral ; Cultivated land ; Geochemistry ; Phosphorus ; Slope gradient ; Soil ; Soil properties ; Sugar cane ; São Paulo
The spatial correlations between the composition of the clay fraction (iron - Fe and aluminum - Al oxides, kaolinite and organic matter - OM) and contents of available phosphorus (P) of an Oxisol were evaluated at hillslope scale under sugarcane
their variability and spatial dependence. Available phosphorus had positive spatial correlation with high crystalline goethite, hematite and gibbsite. Identifying small hillslope curvatures is useful with a view to better understanding their relationships with soil
organic matter and available phosphorus, as well as kaolinite and Fe and Al oxide attributes. A simple correlation analysis by itself is inadequate to relate attributes, which requires a supplemental, geostatistical technique.
Spatial distribution and risk assessment of phosphorus loss potential in urban–suburban soil of Lishui, China
China ; Geographical information system ; Phosphorus ; Pollution ; Soil ; Soil pollution ; Spatial distribution ; Urban area ; Zhejiang
Urban and suburban soil phosphorus (P) pools have a great impact on environmental quality. A total of 126 surface soil samples were collected from urban and suburban areas of a typical developing city (Lishui, in the southwest Zhejiang Province
showed that the region of high P loss risk was mainly distributed in the old and central urban region and northeast edge of the studied area. A phosphorus loss indicator combined with GIS would be helpful for the city government to best predict and manage
Phosphorus enrichment from point to catchment scale following fire in eucalypt forests
Australia ; Eucalyptus ; Forest ; Forest fire ; Geochemistry ; New South Wales ; Nutrient ; Phosphorus ; Sediment transport ; Soil properties ; Water erosion ; Watershed
In a study in wet eucalypt forests burnt by wildfire, phosphorus concentration on mineral sediment and organic material at the point (0.01 m2), plot (1–10 m2) and catchment (106 m2) was used to estimate enrichment ratios (ERs) over 2 scales
heterogeneity of post-burn soil hydraulic properties. The association of total phosphorus with mineral material was slightly higher than with organic matter. The study suggests that using plot scale hillslope experiments to infer sediment and nutrient loss after
Effects of two perennials, fallow and millet on distribution of phosphorus in soil and biomass on sloping loess land, China
This study assesses the impact of vegetation restoration on the distribution of phosphorus (P) and aboveground biomass on a sloping land in the Liudaogou catchment in Shenmu County. the AA. use 4 experimental plots with a shrub, Korshinsk Peashrub
Temporal and spatial dynamics of nitrogen and phosphorus in surface water and sediments of a transboundary river located in the semi-arid region of Turkey
Anatolia ; Cluster analysis ; Eutrophication ; Human impact ; Hydrochemistry ; Nitrogen ; Phosphorus ; Pollution ; Semi-arid area ; Space time ; Stream ; Surface water ; Turkey ; Water quality
Total nitrogen (TN) and total phosphorus (TP) levels in water and sediments of the Tigris River were analyzed at 7 different sites during the period of February 2008 to January 2009. Cluster analysis, analysis of variance (ANOVA) and correlation
This study assessed how different hill slope positions under uniform management practice within a Khasi mandarin orchard (Citrus reticulata Blanco) influence biological pools of carbon (C), nitrogen (N), and phosphorus (P), and soil quality
Biogeochemistry ; China ; Geochemistry ; Isotope dating ; Mountain ; North-Eastern China ; Peat bog ; Phosphorus ; Vegetation ; Volcanic soil
Forms and accumulation of soil phosphorus (P) were measured in a subalpine quaking peatland on Mt. Changbai in China that is located 1 km from the North Korea border. Peat cores were collected from 4 sites and radiometrically dated to determine long
phosphorus forms exist in the minerotrophic fens. Compared with other peatlands, the accumulation of total phosphorus in the Yuanchi peatland was higher, suggesting that the volcanic parent material had an influence on P accumulation.