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Showing 1 to 9 of 9 for “"phosphorus fractionation"”.
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Soil phosphorus fractionation and plant growth relationships
The measurement of phosphorus which is available to plants is a problem closely related to the forms and amounts of phosphorus present in soils. The fractionation of soil phosphorus, based on a series of extractions, is a procedure that has been utilized by many investigators. In this study, this …
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Sediment Phosphorus Cycling in a Managed System Irondequoit Bay, N.Y.
The current status of internal phosphorus loading was evaluated in Irondequoit Bay, NY, an embayment of Lake Ontario. Sediment core incubation experiments and phosphorus water column profiles were used to quantify the release rate of phosphorus from the deepwater sediments of Irondequoit Bay during …
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Phosphorus availability in amended minesoils as measured by forage Growth and soil tests
Fertilizer recommendations for correction of phosphorus deficiencies in minesoils based on the dilute double acid test are often of little value for minesoils. This research was designed to determine which of several soil tests gives the best estimation of plant-available P and to determine ways to …
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Interactions Between Land Use and Local Lithology on Phosphorus Distribution in Northrup Creek Sediments, Monroe County, New York
Phosphorus, a key nutrient in many aquatic systems that limits the growth of algae, plays a key role in the occurrence of eutrophication and toxic algal blooms. Past research has shown that land use and lithology are major contributors of phosphorus in a creek. High levels of organic phosphorus …
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The role of metals in enhanced biological phosphorus removal from wastewater
The role of metal cations in enhanced biological phosphorus removal (EBPR) from wastewater by activated sludge was investigated. Potassium and magnesium were simultaneously required for efficient EBPR. Neither potassium nor magnesium could induce enhanced phosphorus uptake on its own. Cations were …
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Soil phosphatase activity: sources of variability and relationships with phosphorus fractions
Soil phosphorus (P) is hypothesized to exist in pools varying in availability given that its availability is controlled by interacting soil geochemical and biological processes. Soil P pools have been widely characterized by sequentially extracting P from soils with increasing strength of …
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Phosphorus Retention and Fractionation in Masonry Sand and Light Weight Expanded Shale Used as Substrate in a Subsurface Flow Wetland
… an inefficient technology for long-term phosphorus (P) removal. The P retention effectiveness of subsurface wetlands can be improved by using appropriate substrates. The objectives of this study were to: (i) use sorption isotherms to estimate the P sorption capacity of the two materials, …
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Interactive effects of hemlock mortality and nitrogen availability on nutrient pools and fluxes in the southern Appalachian Mountains
… P was similar across the study area, however, P fractionation revealed distinct changes in the distribution of soil P fractions as N increased. Soils from high elevation, high N-available sites had 310% higher concentration of organic P and 55% smaller residual and refractory P pools than soils …
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Characterizing phosphate desorption kinetics from soil : an approach to predicting plant available phosphorus
… P desorption by DMT-HFO followed by a subsequent fractionation method (combined method) (ii) to assess how the information gained from P desorption kinetic data relates to plant growth at green house and field trials (iii) to investigate the effect of varying shaking time on DMT-HFO extractable P …