John F. Timmons is an author at Iowa State University specializing in engineering, agricultural economics, and natural resource economics.
Top concepts
EngineeringAgricultural EconomicsNatural Resource EconomicsLand UsePublic HealthLand ApplicationLand DegradationSustainable AgricultureRunoffBusiness
Publications per year
1959–1980
6
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Rows per page
1–5 of 6