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(1899) Yearbook of the United States Department of Agriculture, 1899. Agriculture and Land Stewardship
(2001) Hub/Spokes Nutrient Management Model, 2001. Agriculture and Land Stewardship
(2002) Cropping Practices Baseline Data, 2002. Agriculture and Land Stewardship
(2002) Iowa Soil Properties and Interpretation Database, 2002. Agriculture and Land Stewardship
(2019) Watershed Planning Advisory Council 2019 Annual Report, November 21, 2019. Agriculture and Land Stewardship
(2020) Watershed Planning Advisory Council 2020 Annual Report, November 30, 2020. Agriculture and Land Stewardship