@article{Wilson-2019-Near‐Surface,
title = "Near‐Surface Soils as a Source of Phosphorus in Snowmelt Runoff from Cropland",
author = "Wilson, Henry F. and
Elliott, J. G. and
Macrae, Merrin L. and
Glenn, Aaron J.",
journal = "Journal of Environmental Quality, Volume 48, Issue 4",
volume = "48",
number = "4",
year = "2019",
publisher = "Wiley",
url = "https://gwf-uwaterloo.github.io/gwf-publications/G19-36011",
doi = "10.2134/jeq2019.04.0155",
pages = "921--930",
abstract = "In northern regions, a high proportion of annual runoff and phosphorus (P) export from cropland occurs with snowmelt. In this study, we analyze 57 site-years of field-scale snowmelt runoff data from 16 small watersheds draining fine-textured soils (clay or clay loam) in Manitoba, Canada. These fields were selected across gradients of soil P (2.4 to 26.7 mg kg, 0- to 15-cm Olsen P), tillage intensity (high frequency to long-term no-till), and fertilizer input. The strongest predictor of flow-weighted mean concentrations of total dissolved P (TDP) in snowmelt runoff was Olsen P in the top 5 cm of soil ( = 0.45, {\textless} 0.01). Residual variation in this relationship related positively to volumetric soil moisture and negatively to water yield. Although Olsen P levels were relatively consistent from year to year, suggesting control by long-term fertilization and tillage history, Olsen P stratification (ratio of 0-5/0-15 cm) increased with rates of fertilizer application. Particulate P (PP) comprised {\textless}34{\%} of total P on average, and concentrations were not well predicted by soil or management characteristics. Loads of PP and TDP exported during snowmelt were primarily a function of water yield and size of accumulated snowpack; however, residual variation in the TDP relationship correlated positively with both soil moisture and Olsen P. Retention of runoff water on the landscape could reduce loads, but careful management of near-surface soil P is required to prevent snowmelt runoff losses of P at the source and to reduce the potential for the eutrophication of downstream aquatic ecosystems.",
}
<?xml version="1.0" encoding="UTF-8"?>
<modsCollection xmlns="http://www.loc.gov/mods/v3">
<mods ID="Wilson-2019-Near‐Surface">
<titleInfo>
<title>Near‐Surface Soils as a Source of Phosphorus in Snowmelt Runoff from Cropland</title>
</titleInfo>
<name type="personal">
<namePart type="given">Henry</namePart>
<namePart type="given">F</namePart>
<namePart type="family">Wilson</namePart>
<role>
<roleTerm authority="marcrelator" type="text">author</roleTerm>
</role>
</name>
<name type="personal">
<namePart type="given">J</namePart>
<namePart type="given">G</namePart>
<namePart type="family">Elliott</namePart>
<role>
<roleTerm authority="marcrelator" type="text">author</roleTerm>
</role>
</name>
<name type="personal">
<namePart type="given">Merrin</namePart>
<namePart type="given">L</namePart>
<namePart type="family">Macrae</namePart>
<role>
<roleTerm authority="marcrelator" type="text">author</roleTerm>
</role>
</name>
<name type="personal">
<namePart type="given">Aaron</namePart>
<namePart type="given">J</namePart>
<namePart type="family">Glenn</namePart>
<role>
<roleTerm authority="marcrelator" type="text">author</roleTerm>
</role>
</name>
<originInfo>
<dateIssued>2019</dateIssued>
</originInfo>
<typeOfResource>text</typeOfResource>
<genre authority="bibutilsgt">journal article</genre>
<relatedItem type="host">
<titleInfo>
<title>Journal of Environmental Quality, Volume 48, Issue 4</title>
</titleInfo>
<originInfo>
<issuance>continuing</issuance>
<publisher>Wiley</publisher>
</originInfo>
<genre authority="marcgt">periodical</genre>
<genre authority="bibutilsgt">academic journal</genre>
</relatedItem>
<abstract>In northern regions, a high proportion of annual runoff and phosphorus (P) export from cropland occurs with snowmelt. In this study, we analyze 57 site-years of field-scale snowmelt runoff data from 16 small watersheds draining fine-textured soils (clay or clay loam) in Manitoba, Canada. These fields were selected across gradients of soil P (2.4 to 26.7 mg kg, 0- to 15-cm Olsen P), tillage intensity (high frequency to long-term no-till), and fertilizer input. The strongest predictor of flow-weighted mean concentrations of total dissolved P (TDP) in snowmelt runoff was Olsen P in the top 5 cm of soil ( = 0.45, \textless 0.01). Residual variation in this relationship related positively to volumetric soil moisture and negatively to water yield. Although Olsen P levels were relatively consistent from year to year, suggesting control by long-term fertilization and tillage history, Olsen P stratification (ratio of 0-5/0-15 cm) increased with rates of fertilizer application. Particulate P (PP) comprised \textless34% of total P on average, and concentrations were not well predicted by soil or management characteristics. Loads of PP and TDP exported during snowmelt were primarily a function of water yield and size of accumulated snowpack; however, residual variation in the TDP relationship correlated positively with both soil moisture and Olsen P. Retention of runoff water on the landscape could reduce loads, but careful management of near-surface soil P is required to prevent snowmelt runoff losses of P at the source and to reduce the potential for the eutrophication of downstream aquatic ecosystems.</abstract>
<identifier type="citekey">Wilson-2019-Near‐Surface</identifier>
<identifier type="doi">10.2134/jeq2019.04.0155</identifier>
<location>
<url>https://gwf-uwaterloo.github.io/gwf-publications/G19-36011</url>
</location>
<part>
<date>2019</date>
<detail type="volume"><number>48</number></detail>
<detail type="issue"><number>4</number></detail>
<extent unit="page">
<start>921</start>
<end>930</end>
</extent>
</part>
</mods>
</modsCollection>
%0 Journal Article
%T Near‐Surface Soils as a Source of Phosphorus in Snowmelt Runoff from Cropland
%A Wilson, Henry F.
%A Elliott, J. G.
%A Macrae, Merrin L.
%A Glenn, Aaron J.
%J Journal of Environmental Quality, Volume 48, Issue 4
%D 2019
%V 48
%N 4
%I Wiley
%F Wilson-2019-Near‐Surface
%X In northern regions, a high proportion of annual runoff and phosphorus (P) export from cropland occurs with snowmelt. In this study, we analyze 57 site-years of field-scale snowmelt runoff data from 16 small watersheds draining fine-textured soils (clay or clay loam) in Manitoba, Canada. These fields were selected across gradients of soil P (2.4 to 26.7 mg kg, 0- to 15-cm Olsen P), tillage intensity (high frequency to long-term no-till), and fertilizer input. The strongest predictor of flow-weighted mean concentrations of total dissolved P (TDP) in snowmelt runoff was Olsen P in the top 5 cm of soil ( = 0.45, \textless 0.01). Residual variation in this relationship related positively to volumetric soil moisture and negatively to water yield. Although Olsen P levels were relatively consistent from year to year, suggesting control by long-term fertilization and tillage history, Olsen P stratification (ratio of 0-5/0-15 cm) increased with rates of fertilizer application. Particulate P (PP) comprised \textless34% of total P on average, and concentrations were not well predicted by soil or management characteristics. Loads of PP and TDP exported during snowmelt were primarily a function of water yield and size of accumulated snowpack; however, residual variation in the TDP relationship correlated positively with both soil moisture and Olsen P. Retention of runoff water on the landscape could reduce loads, but careful management of near-surface soil P is required to prevent snowmelt runoff losses of P at the source and to reduce the potential for the eutrophication of downstream aquatic ecosystems.
%R 10.2134/jeq2019.04.0155
%U https://gwf-uwaterloo.github.io/gwf-publications/G19-36011
%U https://doi.org/10.2134/jeq2019.04.0155
%P 921-930
Markdown (Informal)
[Near‐Surface Soils as a Source of Phosphorus in Snowmelt Runoff from Cropland](https://gwf-uwaterloo.github.io/gwf-publications/G19-36011) (Wilson et al., GWF 2019)
ACL
- Henry F. Wilson, J. G. Elliott, Merrin L. Macrae, and Aaron J. Glenn. 2019. Near‐Surface Soils as a Source of Phosphorus in Snowmelt Runoff from Cropland. Journal of Environmental Quality, Volume 48, Issue 4, 48(4):921–930.
