Phosphorus Losses
Major agricultural changes required to mitigate phosphorus losses under climate change
... Phosphorus losses from land to water will be impacted by climate change and land management for food production, with detrimental impacts on aquatic ...future phosphorus transfers, and to assess what ...
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Possible phosphorus losses from the top layer of agricultural soils by rainfall simulations in relation to multi nutrient soil tests
... predicting phosphorus leaching from the top layer of agricultural soils by rainfall simulations by means of three multi-nutrient soil tests: Mehlich 3, NH 4 -ac- etate extraction and water extraction (1:5, ...
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Percolation phosphorus losses in calcareous furrow-irrigated soils
... Lower field percolation MRP concentrations exceeded ortho-P concentrations expected in topsoil or subsoil (measured in dilute CaC12 extracts) and also exceeded MRP concentrations in furr[r] ...
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Phosphorus losses from an irrigated watershed in the Northwestern U.S.: Case study of the Upper Snake Rock Watershed
... Converting from furrow irrigation to sprinkler irrigation or changing cropping systems can reduce TSS and P losses from irrigated fields. For fields that continue to be furrow irrigated, erosion can be reduced 60 ...
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Nitrogen and phosphorus losses from a feedlot for suckler cows
... In many countries, beef cattle are fed in open feedlots, but the climate there differs from Finn- ish winter conditions. In Finland, snow melt causes runoff of nutrients and faecal micro-or- ganisms from areas treated ...
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Reducing phosphorus losses from surface-irrigated fields: emerging polyacrylamide technology
... Our objectives were to test the following hypotheses: (i) PAM treatment substantially reduces total P, ortho P, NO3-N, and COD concentrations and mass losses in irrigation runoff; (ii) P[r] ...
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The assessment and potential for mitigation of phosphorus losses from Organic soils under intensive dairying
... The processes of FRP flux are enhanced in soils with high porosity and hydraulic conductivity values, such as Organic and Podzol soils. This is due to the combination of high surface areas within the soil matrix for P ...
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Agricultural phosphorus losses and eutrophication in Nordic Baltic countries
... Runoff: 100–1300 mm Denmark: subsurface losses important Finland: surface runoff and erosion important Streambank erosion Ground water flow.. Crop yield Rain/snow Frost..[r] ...
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Prediction of dissolved reactive phosphorus losses from small agricultural catchments: calibration and validation of a parsimonious model
... to allow the use of conventional soil maps to assign the soils of the simulated catchment to these classes. The hydrological predictions were in line with the CSA concept and highlight the dominant role of topography. ...
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A comparison of three simple approaches to identify critical areas for runoff and dissolved reactive phosphorus losses
... Diffuse phosphorus (P) losses are the main cause for eutrophication of surface waters in many ...rainfall-runoff- phosphorus (RRP) model, the dominant runoff processes (DoRP) model, and the Sensitive ...
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Phosphorus losses in furrow irrigation runoff
... Abbreviations: DRP, dissolved molybdate-reactive phosphorus in fil- tered (0.45 p.m) runoff water; FeO-P„ iron-oxide impregnated paper- extractable phosphorus from furrow soil; FeO-P w,[r] ...
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Agricultural phosphorus losses and eutrophication in Nordic Baltic countries
... P losses also originate from diffuse sources; only in Lithuania do point sources still form the largest P input to waters (HELCOM, 2005; ...P losses in the Nordic-Baltic countries are briefly ...
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Fecal phosphorus excretion and characterization from swine fed diets containing a variety of cereal grains
... for phosphorus and phytate ranged from ...phytate phosphorus excreted in the feces regardless of the type of cereal grain fed (< 6% of total phosphorus) and phytate degradation was not related to ...
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Fate of the organophosphate herbicide glyphosate in arable soils and its relationship to soil phosphorus status
... of phosphorus and glypho- sate sorption; with increasing DPS, ad- sorption of glyphosate decreased (K F values decreased) (Table ...apatitic phosphorus dissolving in oxalate extraction, thus leading to ...
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The Effect of Shallow Subsurface Drains on Nitrate-N and Orthophosphorus Losses from Drained Agricultural Lands
... P losses in drainage ...soluble phosphorus in drainage outflow especially in situations where liquid manure or lagoon effluent is applied as ...More phosphorus may be present in the soluble form with ...
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DRAINMOD-P: A Model for Simulating Phosphorus Dynamics and Transport in Artificially Drained Agricultural Lands.
... Macropores are critical pathways through which water and pollutants can bypass portions of soil matrix and take the least-resistant pathways to subsurface drains and out to fresh water bodies. We modified the DRAINMOD ...
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Essays on socially optimal phosphorus policies in crop production
... available phosphorus in soil is generally more important for crop growth than the annually applied phos- ...for phosphorus use are based on the fertilizer’s immediate effect on crop yields (see, ...soil ...
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Drying Method Effects on Extractable Phosphorus Levels in Plant Tissue
... The level of soluble tissue phosphorus (PO 4 -P) may be corre- lated with the plant P nutritional status, but the amount ex- tracted depends upon dry matter losses or the amount of enzym[r] ...
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Fate of compost nutrients as affected by co-composting of chicken and swine manures
... Several authors have reported the composting of these manures with different BAs: poultry manure (Ogunwande, 2011; Ogunwande and Osunade, 2011; Ogunwande et al., 2008; Paredes et al., 1996; Silva et al., 2009; Tiquia and ...
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The efficacy of good practice to prevent long-term leaching losses of phosphorus from an irrigated dairy farm
... subsurface transport has been facilitated by preferential flow that by- passes the soil matrix using macropores, especially if macropores are connected to an artificial drainage network (Monaghan et al., 2016). ...
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