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The Office of Indiana State Chemist has recently migrated its data handling application software to a new vendor. This software handles our pesticide licensing and registration information. Due to the change in systems the look and feel of the public search functions (what you use to find your records and CCH programs) will be different. The functionality will be the same, however the appearance of the data will be different. This notice is to alert our clients of the change that will occur on December 3, 2018.

Board of Registration; Administration of IRSS

Board of Registration:


The Indiana Registry of Soil Scientists is managed by the Board of Registration for Soil Scientists, a five-member Board apointed by the Governor. Four of the members are Registered Professional Soil Scientists whose addresses and telephone numbers appear in the Roster. Currently, they are:



Term Expires:
David Lefforge
117 W Harvest Road
Bluffton, IN 46714-9907
Telephone: 765-824-1930, Ext. 3
Cell: 260-416-7362

Gary Steinhardt
2602 Nottingham Place
West Lafayette, IN 47906
Telephone: 765-494-8063
Home: 765-463-1446

Tom A. Eickholtz
10489 N 900 E
Kendallville, IN  46755
Telephone: 260-318-2858

North Private Consultant
Spencer Williams
1771 S. State Road 3
Scottsburg, IN 47170
Telephone: 812-889-3524

South Private Consultant
John Bonsett
2391 South Old US 31
Franklin, IN 46131
Home: 317-374-0328

Non-Soil Scientist


IC 25-31.5-2-4

Terms of Members
(a) Each board member serves a term of four (4) years.
(b) A board member may serve until the member's successor is appointed and qualified under this chapter.

(c) A board member may not serve more than two (2) consecutive terms.

Administration of IRSS:

The program is administered by the Office of Indiana State Chemist on the Purdue University campus:

Indiana Registry of Soil Scientists
Office of Indiana State Chemist
Purdue University
175 S. Universtiy Street
West Lafayette, IN  47907-2063
Telephone: 765-494-1492
Fax: 765-494-4331

The Administrative Advisor in the Office of Indiana State Chemist is Matthew E. Pearson. If you, as a user of soil information, have questions about the program, or concerns about the work done by a Registered Soil Scientist, contact IRSS (contact information shown above).