Phosphorus budgets for Pennsylvania cropland: 1939 to 2002

Les E. Lanyon, Kathleen E. Arrington, Charles William Abdalla, Douglas Brian Beegle

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

Historically phosphorus (P) was applied to cropland based on expected crop response and to correct soil nutrient deficiencies. As these deficiencies have become less common and animal production has intensified in many regions, concerns about surplus cropland P becoming a water resource pollutant have replaced historical concerns. To understand spatial and temporal changes in P surpluses, P budgets were developed for Pennsylvania cropland at approximately ten-year intervals from 1939 to 2002. The P balance, the difference between inputs to crop land (manure and fertilizer) and outputs (harvested crops), estimates the change in soil P storage plus P losses through runoff, erosion and leaching. Although the state-level P balance decreased since 1949, in 20 counties the maximum excess P occurred since 1992. Nutrient budgets, such as those developed for P in this research, can contribute to more informed strategies to reduce or prevent cropland P surpluses and thus reduce the risk to water quality.

Original languageEnglish (US)
Pages (from-to)51-58
Number of pages8
JournalJournal of Soil and Water Conservation
Volume61
Issue number2
StatePublished - Dec 14 2006

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All Science Journal Classification (ASJC) codes

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

Cite this

Lanyon, L. E., Arrington, K. E., Abdalla, C. W., & Beegle, D. B. (2006). Phosphorus budgets for Pennsylvania cropland: 1939 to 2002. Journal of Soil and Water Conservation, 61(2), 51-58.