Agronomic and environmental soil phosphorus tests for predicting potential phosphorus loss from Ontario soils

Geoderma ◽  
2015 ◽  
Vol 241-242 ◽  
pp. 51-58 ◽  
Author(s):  
Y.T. Wang ◽  
T.Q. Zhang ◽  
I.P. O'Halloran ◽  
Q.C. Hu ◽  
C.S. Tan ◽  
...  
Keyword(s):  
Soil Phosphorus ◽  
Phosphorus Loss

Sorption Indices to Estimate Risk of Soil Phosphorus Loss in the Rathbun Lake Watershed, Iowa

Soil Science ◽  
2011 ◽  
pp. 1 ◽  
Author(s):  
Najphak Hongthanat ◽  
John L. Kovar ◽  
Michael L. Thompson
Keyword(s):  
Soil Phosphorus ◽  
Phosphorus Loss

Phosphorus critical source areas identification in an agricultural watershed of Three Gorges Reservoir Area, China

2021 ◽  
Author(s):  
Yiwen Zhou ◽  
Zhaoxia Li
Keyword(s):  
Three Gorges Reservoir ◽  
Soil Phosphorus ◽  
Threshold Value ◽  
Point Sources ◽  
Agricultural Watershed ◽  
Three Gorges Reservoir Area ◽  
Three Gorges ◽  
Critical Source Areas ◽  
Phosphorus Loss ◽  
Source Areas

<p>Agricultural non-point sources (ANPS) pollution are considered to pose risks to water quality in Three Gorges Reservoir Areas (TGRA), especially when those pollution source comes from the hydrologically sensitive areas (HSAs) that generate surface runoff pathways. Therefore, it is necessary to identify the critical source areas (CSAs) or the sensitive regions of pollutants from agricultural lands in order to control and mitigate ANPS pollution effectively. In this study, an improved method integrating the Phosphorus Index (PI) and the Soil Topographic Index (STI) was applied to predict the risk of phosphorus loss and delineate the CSAs of phosphorus in a typical agricultural watershed in TGRA, China. The results showed that using a STI threshold value of 8.5, the HSA was identified 22.08% of watershed areas. The intersection of above two parts account 5.47% of the total watershed, compared with 24.41% of watershed areas based on an existing approach that uses just one criterion. As the results showed , the CSAs of phosphorus loss were mainly located near streams, with high or relatively high soil phosphorus contents or phosphorus fertilizer, or intense soil erosion are observed. The calculated results are in good agreement with the actual situation. Since the approach is based on GIS, and is a relatively simple application uses readily available geospatial data, therefore the technic could be used to improve cost-effectiveness and provide a useful screening tool for water resource managers responsible for identifying and remediating critical NPS source areas. </p>

Simulating Soil Phosphorus Dynamics for a Phosphorus Loss Quantification Tool

2012 ◽  
Vol 41 (6) ◽  
pp. 1750-1757 ◽  
Author(s):  
Peter A. Vadas ◽  
Brad C. Joern ◽  
Philip A. Moore
Keyword(s):  
Soil Phosphorus ◽  
Phosphorus Loss ◽  
Phosphorus Dynamics

Estimating Legacy Soil Phosphorus Impacts on Phosphorus Loss in the Chesapeake Bay Watershed

2018 ◽  
Vol 47 (3) ◽  
pp. 480-486 ◽  
Author(s):  
Peter A. Vadas ◽  
Nicole M. Fiorellino ◽  
Frank J. Coale ◽  
Robert Kratochvil ◽  
Alisha S. Mulkey ◽  
...  
Keyword(s):  
Chesapeake Bay ◽  
Soil Phosphorus ◽  
Phosphorus Loss ◽  
Chesapeake Bay Watershed

Detecting and analyzing soil phosphorus loss associated with critical source areas using a remote sensing approach

2016 ◽  
Vol 573 ◽  
pp. 397-408 ◽  
Author(s):  
Hezhen Lou ◽  
Shengtian Yang ◽  
Changsen Zhao ◽  
Liuhua Shi ◽  
Linna Wu ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Soil Phosphorus ◽  
Critical Source Areas ◽  
Phosphorus Loss ◽  
Source Areas
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