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ARS Home » Midwest Area » St. Paul, Minnesota » Soil and Water Management Research » Research » Publications at this Location » Publication #62102
Title: WETTING FRONT MOVEMENTS IN AN AQUIC HAPLUSTOLL AS RELATED TO TILLAGE SYSTEMS

Author
item Allmaras, Raymond
item HUGGINS, DAVID - UNIVERSITY OF MINNESOTA
item Copeland, Stephen
item GIMENEZ, DANIEL - UNIVERSITY OF MINNESOTA

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 1/20/1996
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Dry bulk density, Ksat, water characteristic curves, shrinkage, dye movement, buried crop residue all reveal an Ap layer distinct from the subsoil. Transient soil pore-water pressures (measured with automated tensiometers at 15-cm depth increments from 15 to 60 cm) indicated layering in ridge-till, moldboard, no-tillage, and chisel-based systems. Wetting front movements (WFM) observed during and after rainfall events differed between tillage treatments. Soybean rooting was compared in ridge-till and after chisel or moldboard primary tillage; corn rooting in ridge-till and after no-tillage or chisel primary tillage. Instantaneous- profile measured hydraulic properties supplemented with laboratory measurements were used in RZWQM to model WFM and potential internal catchments.