Dr. Stewart Wuest

Position: Soil Scientist

Email:

Phone: 541-278-4381

Background:

    Stewart Wuest received his BS degree in Agrarian Studies from the University of California in 1980, where he later earned a master's degree in Agronomy, and in 1991, a PhD in Soil Science.

Current Research Projects

• Sustainable Crop and Soil Management Systems for Dryland Pacific Northwest Agriculture:

Objective:
Identify pathways of water infiltration into soil and factors producing high infiltration rates. Produce guidelines for high infiltration capacity.

Approach:
Changes in soil fauna, carbon accumulation, porosity characteristics, compaction, aggregation, and microbial activity will be investigated for their role in water infiltration into tilled and untilled cropping systems. Dye tracing and other techniques will be developed to identify actual infiltration routes.

Selected Publications:

-         Long-Term Experiments at Cbarc-Pendleton, 2004
Machado, S., Rhinhart, K., Petrie, S., Wuest, S.B., Correa, R.F., Johlke, T.R. 2005. Long-term experiments at CBARC-Pendleton, 2004. In 2005 Dryland Agricultural Research Annual Report, p.73-87. DA. Long, S.E. Petrie and P.M. Frank, eds. SR 1061. Corvallis, OR: Oregon State Univeristy Agric. Exp. Station in cooperation with USDA-ARS, Pendleton, OR.)

-         Organic Matter Additions, N, and Residue Burning Effects on Infiltration, Biological, and Physical Properties of An Intensively Tilled Silt-Loam Soil. - (29-Nov-04)

-         Rotary Subsoiling to Reduce Erosion and Improve Infiltration in Newly Planted Winter Wheat after Summer Fallow
Williams, J.D., Wuest, S.B., Schillinger, W.F., Gollany, H.T. 2004. Rotary subsoiling to reduce erosion and improve infiltration in newly planted winter wheat after summer fallow. IN: Special Report 1054, 2004 Columbia Basin Agricultural Research Center Annual Report. Oregon State University, 8 june 2004, Adams, OR.

-         Seed-Soil Contact and the Role of Vapor in Germination
Wuest, S.B. Seed-soil contact and the role of vapor in germination. Columbia Basin Agricultural Research Annual Report. 2003.

-         Soil Nutrient, Temperature, and Moisture Dynamics: Comparing No-Till to Tilled with and Without Residue Cover
Wuest, S.B. Soil nutrient, temperature, and moisture dynamics: comparing no-till to tilled with and without residue cover. Soil Ecology Society Ninth Biannual Internation Conference Abstracts. 2003.

-         Carbon Dioxide Flux Measurement During Simulated Tillage
Wuest, S.B., Durr, D., Albrecht, S.L., Carbon dioxide flux measurement simulated tillage, Agronomy Journal, 95:715-718 (2003).

-         A New Perspective on Water Flow from Soil to Seed: the Role of Vapor
Wuest, S.B. A new perspective on water flow from soil to seed: the role of vapor. Agronomy Abstracts. 2002.

-         Water Transfer from Soil to Seed: the Role of Vapor Transport - (07-May-02)

-         Ecology of Untilled Cropping Systems in the Semi-Arid Pacific Northwest - (20-May-01)

-         Soil Biopore Estimation: Effects of Tillage, Nitrogen and Photographic Resolution - (26-Apr-01)

-         Earthworm, Infiltration, and Tillage Relationships in a Dryland Pea-Wheat Rotation - (24-Apr-01)

-         No-Till Influence on Hydrology and Stream Morphology in Dryland Crop Area - (01-Feb-01)

-         How Tillage and Cropping Systems Change Soil Organic Matter. Inland Pacificnorthwest Research. - (18-Jan-01)

-         Earthworm Populations under Four Tillage Levels in a Wheat/pea Rotation - (03-Jul-00)

-         Direct Seeding Influence on Hydrology and Stream Morphology in Dryland Crop Areas - (25-Apr-00)

-         Crop Residue Position and Interference with Wheat Seedling Development - (17-Apr-00)

-         Soil Carbon in Long-Term Pacific Northwest Agroecosystems - (01-Aug-99)

-         Documenting Soil Quality Changes in the Transition to No-Till: 16 Years No-Till Versus First Year No-Till and Conventional Tillage Near Pendleton, Oregon - (05-Jan-99)

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