Surface Energy Balance Partitioning in Tilled Bare Soils

Ohene Akuoko, Dilia Kool, Thomas J. Sauer, Robert Horton

Research output: Contribution to journalLetterpeer-review

3 Scopus citations

Abstract

Core Ideas: Following tillage, soil bulk density increased after rainfall. Increases in soil bulk density decreased the available energy for turbulent fluxes. Surface energy balances in tilled soils are affected by changes in bulk density. Surface energy balance (SEB) partitioning is critical to heat and water budgets at the soil–atmosphere interface. Tillage can alter SEB partitioning by initially decreasing soil bulk density (ρb), after which ρb increases with time due to rainfall and other factors. The objective of this study is to determine the effect of ρb changes on SEB partitioning. We measured SEB components for two 4-d periods (Period 1 and Period 2) at an early-tilled (T1) and late-tilled (T2) bare soil site. During Period 1, ρb, net radiation, and soil heat flux were similar for T1 and T2, but evaporation was higher at T2. During Period 2, ρb was 0.11 g cm‾3 larger at T2 than at T1. This resulted in a 7% higher soil heat flux at T2, which in turn caused 13% less evaporation. These results highlight the importance of considering dynamic ρb with time when determining SEB partitioning for tilled soils.

Original languageEnglish
Article number180039
Pages (from-to)1-4
Number of pages4
JournalAgricultural and Environmental Letters
Volume3
Issue number1
DOIs
StatePublished - 1 Jan 2018
Externally publishedYes

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Soil Science
  • Management, Monitoring, Policy and Law

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