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acres administration agencies agricultural agricultural lime animals areas bacteriology birth rate bulletin cent chemistry College conservation consin cooperation cost courses crime criminal crop delinquency Department disease drainage Driftless Area economic Engineering erosion control factors farm federal fertility field fish forest forestry geology groundwater growth high school highway human Hydraulic important improvement increase industry investigations Laboratory Lake Mendota land land economics MADISON ment mental methods mineral nation natural resources nomic organic physical plankton planning plants population prairie present problems protection rainfall regional relation result river ruffed grouse rural Rural Sociology Science Inquiry social Sociology soil species square miles surface water Survey syphilis timber tion transportation trees trend types United University of Wisconsin various Vilas county wastes water pollution water supplies welfare wildlife Wiscon Wisconsin lakes wood