Soil Consultants

Welcome to the Professional Soil Scientists Association of California’s Consultant’s Directory

Many of PSSAC’s members are private consultants with varied areas of expertise within the field of Soil Science. The following offer consulting services in their areas of specialization, and welcome inquiry by potential clients. Please click on their names to link to their individual pages for additional information including their certifications and areas of expertise. They are listed in alphabetical order:

Glenn Borchardt, Ph.D.
Soil Tectonics
1966 Tice Valley Blvd. #172, Walnut Creek, CA 94595-2203
Voice/Cell: (510) VIA-SOIL
Phone: (510) 654-1619
E-mail:[email protected],

Web Site:
Terry D. Cook
Soil Consultant
3214 Lillard Drive, Davis, CA 95616
Phone or Fax: (530) 753-1062
E-mail: [email protected]
Sidney W. Davis
DAVIS² Consulting Earth Scientists
P.O. Box 734, Georgetown, CA 95634
Phone (530) 333-1405, Fax (530) 333-1009
E-mail: [email protected]
D. Ryan Dodd, CPSS, CPAg, CCA, CA-NSp, TSP
Provost & Pritchard Consulting Group
400 E. Main Street, Suite 300, Visalia, CA 93291
Phone: 559-636-1166, extension 509
Email: [email protected]
David B. Kelley
Kelley & Associates Environmental Sciences, Inc
20 E. Baker Street, Winters, CA 95694
Phone: (530) 795-6006, Fax: (530) 795-6008
E-mail:  [email protected]
Bryan L. Rahn
Coastal Viticultural Consultants
1575 Deer Park Road, Angwin, CA  94508
Phone (707) 965-3700, Toll Free: (888) 965-3755
E-mail:  [email protected]
Web Site: