Applicability of phosphorus site indices to wastewater effluent-irrigated cropland

Research output: Contribution to journalArticle

Abstract

Phosphorus (P) indices, originally developed to assess the risk of P export to aquatic systems from agricultural fields receiving inorganic fertilizers and livestock manures, are being used for other P sources with different characteristics and methods of application. This study determined Pennsylvania P index scores for eleven crop fields of Penn State University's Living Filter system receiving 130 kg P2O5 ha-1 (115 lb P2O5 ac-1) in 2008 via sprinkler irrigation of municipal wastewater effluent. A baseline assessment of P index treated effluent irrigation as surface application of completely soluble P source material with maximum potential of runoff P loss. Three fields located ≤22 m (200 ft) from streams ranked high and very high in P loss rating under baseline assessment. Modified assessments involved changing the application method multiplier and P source coefficient to more accurately reflect the year-round intermittent application of P via sprinkler irrigation. All fields were ranked as having low risk of P export using the modified parameters. Site monitoring data from nearly 50 years of effluent irrigation show no evidence of excess P transport to groundwater or off-site surface water, suggesting that baseline assessment might be overestimating P loss rating of some fields. Results underscore the need to tailor P indexing tools to address the differential risk of P loss for specific P sources and application methods.

Original languageEnglish (US)
Pages (from-to)228-237
Number of pages10
JournalJournal of Soil and Water Conservation
Volume68
Issue number3
DOIs
StatePublished - May 1 2013

Fingerprint

site index
effluents
wastewater
application methods
irrigation
effluent
phosphorus
sprinkler irrigation
multipliers
field crops
mineral fertilizers
animal manures
livestock
manure
surface water
runoff
groundwater
filter
crop
cropland

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Water Science and Technology
  • Soil Science
  • Nature and Landscape Conservation

Cite this

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title = "Applicability of phosphorus site indices to wastewater effluent-irrigated cropland",
abstract = "Phosphorus (P) indices, originally developed to assess the risk of P export to aquatic systems from agricultural fields receiving inorganic fertilizers and livestock manures, are being used for other P sources with different characteristics and methods of application. This study determined Pennsylvania P index scores for eleven crop fields of Penn State University's Living Filter system receiving 130 kg P2O5 ha-1 (115 lb P2O5 ac-1) in 2008 via sprinkler irrigation of municipal wastewater effluent. A baseline assessment of P index treated effluent irrigation as surface application of completely soluble P source material with maximum potential of runoff P loss. Three fields located ≤22 m (200 ft) from streams ranked high and very high in P loss rating under baseline assessment. Modified assessments involved changing the application method multiplier and P source coefficient to more accurately reflect the year-round intermittent application of P via sprinkler irrigation. All fields were ranked as having low risk of P export using the modified parameters. Site monitoring data from nearly 50 years of effluent irrigation show no evidence of excess P transport to groundwater or off-site surface water, suggesting that baseline assessment might be overestimating P loss rating of some fields. Results underscore the need to tailor P indexing tools to address the differential risk of P loss for specific P sources and application methods.",
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Applicability of phosphorus site indices to wastewater effluent-irrigated cropland. / Jaiswal, D.; Elliott, Herschel Adams.

In: Journal of Soil and Water Conservation, Vol. 68, No. 3, 01.05.2013, p. 228-237.

Research output: Contribution to journalArticle

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