The geochemical transformation of soils by agriculture and its dependence on soil erosion: An application of the geochemical mass balance approach

Kyungsoo Yoo, Beth Fisher, Junling Ji, Anthony Aufdenkampe, Jonatan Klaminder

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Agricultural activities alter elemental budgets of soils and thus their long-term geochemical development and suitability for food production. This study examined the utility of a geochemical mass balance approach that has been frequently used for understanding geochemical aspect of soil formation, but has not previously been applied to agricultural settings. Protected forest served as a reference to quantify the cumulative fluxes of Ca, P, K, and Pb at a nearby tilled crop land. This comparison was made at two sites with contrasting erosional environments: relatively flat Coastal Plain in Delaware vs. hilly Piedmont in Pennsylvania. Mass balance calculations suggested that liming not only replenished the Ca lost prior to agricultural practice but also added substantial surplus at both sites. At the relatively slowly eroding Coastal Plain site, the agricultural soil exhibited enrichment of P and less depletion of K, while both elements were depleted in the forest soil. At the rapidly eroding Piedmont site, erosion inhibited P enrichment. In similar, agricultural Pb contamination appeared to have resulted in Pb enrichment in the relatively slowly eroding Coastal Plain agricultural soil, while not in the rapidly eroding Piedmont soils. We conclude that agricultural practices transform soils into a new geochemical state where current levels of Ca, P, and Pb exceed those provided by the local soil minerals, but such impacts are significantly offset by soil erosion.

Original languageEnglish (US)
Pages (from-to)326-335
Number of pages10
JournalScience of the Total Environment
Volume521-522
DOIs
StatePublished - Jul 5 2015

Fingerprint

Agriculture
soil erosion
Erosion
mass balance
piedmont
coastal plain
agriculture
Soils
agricultural practice
agricultural soil
soil
liming
food production
forest soil
transform
erosion
crop
mineral
Crops
Minerals

Keywords

  • Anthropocene
  • Calcium
  • Chemical weathering
  • Fertilizer
  • Geochemical mass balance
  • Liming
  • Phosphorous
  • Soil erosion

Cite this

The geochemical transformation of soils by agriculture and its dependence on soil erosion : An application of the geochemical mass balance approach. / Yoo, Kyungsoo; Fisher, Beth; Ji, Junling; Aufdenkampe, Anthony; Klaminder, Jonatan.

In: Science of the Total Environment, Vol. 521-522, 05.07.2015, p. 326-335.

Research output: Contribution to journalArticle

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