Nitrate Loss in Subsurface Drainage as Affected by Nitrogen Fertilizer Rate by Jaynes, D.B., Colvin, T.S., Karlen, D.L., Cambardella, C.A., Meek, D.W.

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Corn Yield and Nitrate Loss in Subsurface Drainage from Midseason Nitrogen Fertilizer Application by Jaynes, D.B, Colvin, T.S

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Cluster Analysis of Spatiotemporal Corn Yield Patterns in an Iowa Field by Jaynes, D.B, Kaspar, T.C, Colvin, T.S, James, D.E

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Relationship of corn and soybean yield to soil and terrain properties by Kaspar, T.C, Pulido, D.J, Fenton, T.E, Colvin, T.S, Karlen, D.L, Jaynes, D.B, Meek, D.W

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Using the late spring nitrate test to reduce nitrate loss within a watershed by Jaynes, D.B, Dinnes, D.L, Meek, D.W, Karlen, D.L, Cambardella, C.A, Colvin, T.S

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Identifying potential soybean management zones from multi-year yield data by Jaynes, Dan B., Colvin, Tom S., Kaspar, Tom C.

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Model-based technique to determine variable rate nitrogen for corn by Paz, J.O, Batchelor, W.D, Babcock, B.A, Colvin, T.S, Logsdon, S.D, Kaspar, T.C, Karlen, D.L

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Corn response to late-spring nitrogen management in the Walnut Creek watershed by Karlen, D.L, Dinnes, D.L, Jaynes, D.B, Hurburgh, C.R, Cambardella, C.A, Colvin, T.S, Rippke, G.R

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Tillage system effects on 15-year carbon-based and simulated N budgets in a tile-drained Iowa field by Karlen, D.L, Kumar, Ajay, Kanwar, R.S, Cambardella, C.A, Colvin, T.S

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Fuzzy-logic-based decision support system for scheduling tillage operations by Thangavadivelu, Suri, Colvin, Tom S.

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The Cost of Moving Overburden By Various Machine Systems by Colvin, T.S, Anderson, C.E, Buchele, W. F

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