scholarly journals Linking Soil Phosphorus to Dissolved Phosphorus Losses in the Midwest

ael ◽  
2017 ◽  
Vol 2 (1) ◽  
pp. 170004 ◽  
Author(s):  
Emily W. Duncan ◽  
Kevin W. King ◽  
Mark R. Williams ◽  
Greg LaBarge ◽  
Lindsay A. Pease ◽  
...  
Keyword(s):  
Soil Phosphorus ◽  
Dissolved Phosphorus ◽  
Phosphorus Losses

scholarly journals Modelling Dissolved Phosphorus Losses from Accumulated Soil Phosphorus and Applied Fertilizer and Manure for a National Risk Indicator

2021 ◽  
Author(s):  
Keith Reid ◽  
Kimberley D. Schneider
Keyword(s):  
Soil Phosphorus ◽  
Field Measurements ◽  
The United States ◽  
Accurate Estimation ◽  
Risk Indicator ◽  
Runoff Water ◽  
Dissolved Phosphorus ◽  
P Loss ◽  
P Accumulation ◽  
Phosphorus Losses

Balancing the weighting of various components of phosphorus loss in models is a critical but often overlooked step in accurate estimation of risk of P loss under field conditions. This study compared the P loss coefficients used to predict dissolved P losses from desorption from accumulated P in the soil, and those incidental to applications of P as fertilizer or manure, with extraction coefficients determined from actual P losses reported in literature for sites in Canada, with the addition of some sites with similar soils and climate from the northern tier of the United States. The extraction coefficients for dissolved P measured in runoff water was greater by a factor of 6.5X in year-round edge-of-field measurements than in runoff boxes, indicating that models using P extraction coefficients derived from runoff box experiments will be underestimating the magnitude of losses from P accumulation in soil. Differences among the measurement methods (runoff box, rainfall simulator or edge-of-field) were not evident for incidental losses from applied P, but current models appear to over-predict the losses of applied P. Good fit between measured and modelled DP concentrations were achieved by applying coefficients of 0.275 to the fertilizer equations, and 0.219 to the manure equations, implying that 72.5% of fertilizer P and 78% of manure P are not available for runoff. This study underlines the importance of considering the relative weights of the various components of P loss as new models are developed and validated.

scholarly journals Gypsum amendment as a means to reduce agricultural phosphorus loading: an economic appraisal

2012 ◽  
Vol 21 (3) ◽  
pp. 307-324 ◽  
Author(s):  
Antti Iho ◽  
Marita Laukkanen
Keyword(s):  
Soil Phosphorus ◽  
Threshold Level ◽  
Economic Feasibility ◽  
Mitigation Measures ◽  
Phosphorus Loading ◽  
Phosphorus Fertilization ◽  
Soil Test ◽  
Dissolved Phosphorus ◽  
Soil Test Phosphorus ◽  
Phosphorus Losses

This study analyzes the economic feasibility of gypsum amendment as a means to reduce particulate and dissolved phosphorus loads from arable areas. To this end, an optimization model is developed that includes gypsum amendment as well as matching phosphorus fertilization to crop need and the level of soil phosphorus reserves as phosphorus load mitigation measures, with soil phosphorus reserves measured by soil test phosphorus (STP). The optimal extent of gypsum amendment is then determined simultaneously with optimal fertilization use as a function of field STP level. The results indicate that whether or not gypsum amendment is economically feasible depends on field erosion susceptibility and STP level. When accounting for the costs and benefits to the society on the whole, gypsum treatment suits best to mitigation of phosphorus losses from soils with excessively high phosphorus reserves; once a threshold STP level is reached, gypsum amendment is optimally given up. This threshold level depends on field slope and on society’s willingness to pay for water quality.

scholarly journals Revised Method and Outcomes for Estimating Soil Phosphorus Losses from Agricultural Land in the Chesapeake Bay Watershed Model

2017 ◽  
Vol 46 (6) ◽  
pp. 1388-1394 ◽  
Author(s):  
Alisha Spears Mulkey ◽  
Frank J. Coale ◽  
Peter A. Vadas ◽  
Gary W. Shenk ◽  
Gopal X. Bhatt
Keyword(s):  
Chesapeake Bay ◽  
Agricultural Land ◽  
Soil Phosphorus ◽  
Watershed Model ◽  
Chesapeake Bay Watershed ◽  
Phosphorus Losses

Relating Extractable Soil Phosphorus to Phosphorus Losses in Runoff

1996 ◽  
Vol 60 (3) ◽  
pp. 855-859 ◽  
Author(s):  
D. H. Pote ◽  
T. C. Daniel ◽  
P. A. Moore ◽  
D. J. Nichols ◽  
A. N. Sharpley ◽  
...  
Keyword(s):  
Soil Phosphorus ◽  
Phosphorus Losses ◽  
Extractable Soil

Vertical Stratification of Soil Phosphorus as a Concern for Dissolved Phosphorus Runoff in the Lake Erie Basin

2017 ◽  
Vol 46 (6) ◽  
pp. 1287-1295 ◽  
Author(s):  
David B. Baker ◽  
Laura T. Johnson ◽  
Remegio B. Confesor ◽  
John P. Crumrine
Keyword(s):  
Lake Erie ◽  
Soil Phosphorus ◽  
Vertical Stratification ◽  
Dissolved Phosphorus ◽  
Phosphorus Runoff

scholarly journals Closed depressions and soil phosphorus influence subsurface phosphorus losses in a tile‐drained field in Illinois

2020 ◽  
Vol 49 (5) ◽  
pp. 1273-1285
Author(s):  
Luis F. Andino ◽  
Lowell E. Gentry ◽  
Jennifer M. Fraterrigo
Keyword(s):  
Soil Phosphorus ◽  
Phosphorus Losses

Modelling the impacts of management practices on agricultural phosphorus losses to surface waters of Finland

1999 ◽  
Vol 39 (12) ◽  
pp. 265-272 ◽  
Author(s):  
S. Rekolainen ◽  
J. Grönroos ◽  
I. Bärlund ◽  
A. Nikander ◽  
Y. Laine
Keyword(s):  
Management Practices ◽  
Soil Tillage ◽  
Particulate Phosphorus ◽  
The European Union ◽  
Environmental Support ◽  
Dissolved Phosphorus ◽  
Tillage Practices ◽  
Green Cover ◽  
Cultivation Practices ◽  
Phosphorus Losses

This paper presents the changes in cultivation practices in Finnish agriculture resulting from the Agri-Environmental Support Scheme of the Common Agricultural Policy of the European Union. Detailed data were collected by interviewing farmers in four different areas of the country. The potential impacts of changes in cultivation practices on phosphorus losses were assessed using a mathematical simulation model. The variables monitored were: fertilization, winter green cover and soil tillage methods in autumn. The use of fertilizers has decreased to meet the requirements of the support programme. Winter green cover has increased in areas to a minimum level of 30% of the cultivated area. However, the potential impacts on nutrient losses were small. There are two reasons for this: the increase in reduced tillage practices is likely to increase the loss of dissolved phosphorus in southern Finland, and the reduction of set-aside has led to slight increases in particulate phosphorus losses. However, the reduction in grassland fertilization rapidly decreased loss of dissolved phosphorus in northern Finland.

Dissolved Phosphorus Losses by Lateral Seepage from Swine Manure Amendments for Organic Rice Production

2013 ◽  
Vol 77 (3) ◽  
pp. 765-773 ◽  
Author(s):  
X. Q. Liang ◽  
L. Li ◽  
Y.X. Chen ◽  
H. Li ◽  
J. Liu ◽  
...  
Keyword(s):  
Swine Manure ◽  
Rice Production ◽  
Dissolved Phosphorus ◽  
Organic Rice ◽  
Manure Amendments ◽  
Phosphorus Losses

The potential for soil phosphorus tests to predict phosphorus losses in overland flow

2003 ◽  
Vol 166 (4) ◽  
pp. 432-437 ◽  
Author(s):  
John N. Quinton ◽  
Peter Strauss ◽  
Nicola Miller ◽  
Erol Azazoglu ◽  
Markku Yli-Halla ◽  
...  
Keyword(s):  
Overland Flow ◽  
Soil Phosphorus ◽  
Phosphorus Losses

scholarly journals Effectiveness of Cover Crops for Water Pollutant Reduction from Agricultural Areas

2021 ◽  
Vol 64 (3) ◽  
pp. 1007-1017
Author(s):  
Reid Christianson ◽  
Jordan Fox ◽  
Neely Law ◽  
Carol Wong
Keyword(s):  
Water Quality ◽  
Cover Crops ◽  
Cover Crop ◽  
List Type ◽  
Loss Reduction ◽  
Nutrient Losses ◽  
Phosphorus Loss ◽  
Dissolved Phosphorus ◽  
Freeze Thaw ◽  
Phosphorus Losses

HighlightsNitrogen loss reduction due to a cover crop tends to improve with increased cover crop biomass production.Mixed phosphorus loss reduction results in cold climates where freeze-thaw cycles occur and can increase dissolved phosphorus losses.Cereal rye was the primary cover crop studied and tended to provide the most water quality benefits.Abstract. Mitigating nutrient losses from agricultural fields retains these nutrients for subsequent crop production and reduces the risk to downstream water quality. This study evaluated the impact of cover crops, as part of an annual cropping system, on reducing nutrient losses and enhancing water quality. Cover crop literature focusing on water quality was reviewed to determine important factors regarding cover crop performance and cost. Results show that a grass-based cover crop and mixes with grasses tend to increase nitrate loss reduction (40%) compared to legumes (negligible). Biomass growth was also important, with early seeding or growth of a cover crop in areas with increased growing degree days enhancing performance. For phosphorus loss, benefits did not necessarily increase with increasing biomass. Further, dissolved phosphorus concentrations may increase due to freeze-thaw cycles (23%), although overall dissolved phosphorus losses tend to decrease due to less runoff (34%). Cover crop implementation costs ranged from a savings of $25 to $44 ha-1 year-1 before soybeans and corn, respectively, when implementing a cover crop for five straight years to a cost of $193 ha-1 year-1. Including a cover crop in annual crop rotations with adequate time in the fall for germination and growth can reduce nitrogen and phosphorus losses from production agriculture to help meet water quality goals across the U.S. Keywords: Catch crop, Nitrogen, NRCS, Phosphorus, Practice Code 340, USDA, Water quality.

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