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The Agren Team

Tom Buman, President

Tom founded Agren in 1996 with a love for both agriculture and the environment and the ability to see a more cooperative union between the two.  The kid on the tractor from southwest Iowa graduated with a B.S. in Agronomy and MBA from Iowa State University.  Fourteen years with the Natural Resources Conservation Service helped him recognize the need for creative solutions to critical problems.  At Agren, Tom fosters an atmosphere of resourcefulness and can-do attitude that inspires the Agren staff to dream big and produce innovative results for all clients.

Stan Buman

Stan provides day-to-day directional and administrative support for all projects at Agren. In addition, he supervises contractual services and financial affairs for the business and provides background and leadership in the areas of nutrient management and conservation planning. Stan has developed strong relationships in both the government and private sectors, having spent ten years with the Natural Resource Conservation Service in Iowa. For over 21 years, Stan worked in areas of conservation planning and management, crop scouting, consulting and research. Stan received a B.S. in Agronomy from Iowa State University. Stan is also a professional wildlife photographer.

Jamie Ridgely

Jamie joined the Agren staff full time in 2000 after completing a Bachelor of Science degree in Animal Science from Colorado State University and an impressive summer internship with Agren the previous year. Her keen attention to detail and her logical approach to problem solving have equipped her to become the lead project manager for Agren. As a skilled technical writer, Jamie develops many of Agren's grant and project proposals. She also enjoys being able to incorporate her interests in agriculture and rural development into the wide variety of projects at Agren. In 2007, Jamie was invited to become part owner of Agren, proving again her remarkable value to the company as well as to our clients. Jamie executes each and every one of our projects with laser focus on creativity, quality, and timeliness. She and her husband, Cory, live with their three young daughters on the Ridgely family's Century Farm near Rockwell City, where they raise corn, soybeans and Belgian draft horses.

Bob Buman (Ph.D.)

Bob received his Ph.D. in Agronomy from Washington State University specializing in weed science. He spent one year with the USDA-ARS Northern Grains Insect Research Lab researching Corn Rootworms and five years in Wisconsin running pesticide GLP and efficacy studies. The efficacy studies that Bob worked on in Wisconsin and at present in Iowa include numbered and labeled insecticide, fungicide and herbicide compounds from numerous companies. Bob has developed sampling procedures, analyzed data and written reports for a large no-till corn/soybean project in the mid-west. At present, Bob is working on development of software and use-case diagrams for grazing and conservation planning programs.

Bill Buman

Bill's activities at Agren include wetland monitoring and reporting, and efficacy research assistance. He also custom builds and modifies research field equipment. He brings an abundance of practical knowledge to Agren, having farmed since 1976. He earned his Bachelor of Science degree in Agronomy from Iowa State University. He currently raises corn, soybeans, alfalfa as well as native prairie grass and forb seed. He is also experimenting with fruit crops.

Amy Dreith

Amy joined the Agren staff to provide general administrative support including meeting and travel coordination, execution of direct marketing campaigns, website maintenance, and other miscellaneous duties. Since then, Amy's resourcefulness and keen organizational skills have led her to the added responsibility of coordinating project implementation tasks. Amy was raised on a farm in northwest Iowa and later worked in the banking industry in Colorado before moving back to Iowa in 2000 with her husband to purchase a greenhouse and floral shop in Sac City, IA. She and her husband, Brian, now reside on the Dreith family Century Farm near Rolfe, IA with their son and daughter. Amy completed a B.A. degree in Business Marketing and Management from Morningside College in Sioux City, Iowa.

Rob Ravenscroft

Rob is a life-long cattleman with more than 25 years ranching in the Nebraska Sandhills. Living in Lincoln since 2002, he continues his efforts to bring the ranching and conservation communities closer together. He has served on the Nebraska Cattlemen board and is currently a member of the boards of the Sandhills Task Force, The Nature Conservancy (Nebraska Chapter), the Nebraska Partnership for All Bird Conservation, and the Nebraska Environmental Trust. In May 2005, Rob began working with Agren to help develop, test and promote The Grazing Manager. In that capacity he has worked with ranchers and tribes across the West to use the software. Rob and his wife, Jan, enjoy spending time with their son, daughter-in-law and two grandchildren in the Omaha area. Occasional visits to their daughter in California and trips back to the Sandhills are always treasured.

Dave Rohlf

Dave began working with Agren as an engineering consultant in 2008. Dave was born and raised on farm in West Central Iowa. He worked as an engineer for Natural Resources Conservation Service for 36 years before retiring in 2006. Since then, he has provided part time engineering assistance to Jasper Soil and Water Conservation District for a year and more recently provided part time engineering assistance to the Iowa Department of Natural Resources. He has volunteered at Habitat for Humanity in Des Moines, Iowa and Ysleta Lutheran Mission in El Paso, Texas. He resides with his wife Paige in Altoona. Dave has three children and three grandchildren.