T. Colvin

发表

Nitrate loss in subsurface drainage as affected by nitrogen fertilizer rate.

D. Karlen, D. Meek, D. Jaynes, 2001, Journal of environmental quality.

Corn Yield and Nitrate Loss in Subsurface Drainage from Midseason Nitrogen Fertilizer Application

T. S. Colvin, D. B. Jaynes, D. Jaynes, 2006 .

Review and Interpretation: Nitrogen Management Strategies to Reduce Nitrate Leaching in Tile-Drained Midwestern Soils

J. Hatfield, D. Karlen, D. Jaynes, 2002 .

Model-Based Technique to Determine Variable-Rate Nitrogen for Corn

Thomas S. Colvin, William D. Batchelor, Douglas L. Karlen, 1999 .

Yield Mapping by Electromagnetic Induction

W. E. Larson, P. Robert, R. Rust, 1995 .

Relationship Between Six Years of Corn Yields and Terrain Attributes

D. Karlen, D. Meek, D. Jaynes, 2003, Precision Agriculture.

Spatiotemporal variability of corn and soybean yield

Thomas S. Colvin, Dan B. Jaynes, D. Jaynes, 1997 .

Cluster Analysis of Spatiotemporal Corn Yield Patterns in an Iowa Field

T. S. Colvin, David E. James, D. B. Jaynes, 2003 .

Identifying potential soybean management zones from multi-year yield data

T. S. Colvin, Dan B. Jaynes, D. Jaynes, 2005 .

Six Year Yield Variability Within a Central Iowa Field

Thomas S. Colvin, Douglas L. Karlen, D. B. Jaynes, 1996 .

Soil type and crop yield determination from ground conductivity surveys.

D. Jaynes, T. Colvin, J. Ambuel, 1993 .

Estimating corn yield using six years of yield data and terrain attributes.

W. E. Larson, D. Karlen, P. Robert, 2000 .

Thirty-year tillage effects on crop yield and soil fertility indicators

D. Karlen, C. Cambardella, T. Colvin, 2013 .

Nutrient, Labor, Energy and Economic Evaluations of Two Farming Systems in Iowa

D. Karlen, M. Duffy, T. Colvin, 1995 .

Effect of tillage, crop rotation and innovative nitrogen and pesticide management practices on productivity, sustainability and water quality

D. Karlen, C. Cambardella, T. Moorman, 1997 .

Impacts of swine manure application and alternative N-management practices on productivity, sustainability and water quality

D. Karlen, C. Cambardella, T. Moorman, 1998 .

Twelve‐year tillage and crop rotation effects on yields and soil chemical properties in northeast Iowa

Thomas S. Colvin, Ramesh S. Kanwar, Douglas L. Karlen, 1991 .

Tillage system effects on 15-year carbon-based and simulated N budgets in a tile-drained Iowa field

D. Karlen, C. Cambardella, Ajay Kumar, 1998 .

Soil tilth: a review of past perceptions and future needs.

D. R. Timmons, D. Karlen, D. Erbach, 1990 .

Tillage Index Based on Created Soil Conditions

W. F. Buchele, D. Erbach, R. Cruse, 1984 .

Alternative farming system effects on profile nitrogen concentrations on two Iowa farms

D. Karlen, T. Colvin, 1992 .

Spatial Variability Analysis: A First Step in Site-Specific Management

D. Karlen, D. Jaynes, C. Cambardella, 1996 .

Soil quality response to long-term tillage and crop rotation practices

D. Karlen, C. Cambardella, T. Colvin, 2013 .

Economically Optimal Nitrogen Rates of Corn: Management Zones Delineated from Soil and Terrain Attributes

T. S. Colvin, Thomas C. Kaspar, Dan B. Jaynes, 2011 .

Using the late spring nitrate test to reduce nitrate loss within a watershed.

D. Karlen, D. Meek, D. Jaynes, 2004, Journal of environmental quality.

Soil Organic Nitrogen Enrichment Following Soybean in an Iowa Corn–Soybean Rotation

Thomas S. Colvin, Douglas L. Karlen, Thomas C. Kaspar, 2006 .

Cropping System Effects on NO3-N Loss with Subsurface Drainage Water

Rameshwar S. Kanwar, Thomas S. Colvin, Theodore B. Bailey, 2002 .

N-MANAGEMENT AND CROP ROTATION EFFECTS ON YIELD AND RESIDUAL SOIL NITRATE LEVELS1

D. Karlen, C. Cambardella, T. Moorman, 2001 .

TILLAGE AND NITROGEN MANAGEMENT EFFECTS ON CROP YIELD AND RESIDUAL SOIL NITRATE

Thomas S. Colvin, Theodore B. Bailey, Allah Bakhsh, 2000 .

Evaluation of tillage and crop rotation effects on groundwater quality—Nashua project

Thomas S. Colvin, Douglas L. Karlen, William W. Simpkins, 1994 .

Quantifying seedbed condition using soil physical properties

T. Colvin, M. Tapela, 2002 .

Fuzzy-logic-based decision support system for scheduling tillage operations

Suri Thangavadivelu, Tom S. Colvin, T. Colvin, 1997 .

Nitrate Losses in Tile Drainage from Mid-Season N-Fertilizer

D. Jaynes, T. Colvin, 2005 .

SPATIO-TEMPORAL ANALYSIS OF YIELD VARIABILITY FOR A CORN-SOYBEAN FIELD IN IOWA

Thomas S. Colvin, Allah Bakhsh, Rameshwar S. Kanwar, 2000 .

Tillage system effects on crop growth and production costs for a corn-soybean rotation.

R. Cruse, T. Colvin, H. J. Brown, 1989 .

Anhydrous Ammonia Distribution During Field Application

H. Mark Hanna, Thomas S. Colvin, James L. Baker, 2002 .

Relationship of Corn and Soybean Yield to Soil and Terrain Properties

T. S. Colvin, David W. Meek, D. B. Jaynes, 2004 .

Effect of Crop Residue on Soil Loss from Continuous Row Cropping

J. M. Laflen, T. S. Colvin, J. Laflen, 1981 .

Ridge, Moldboard, Chisel, and No‐Till Effects on Tile Water Quality beneath Two Cropping Systems

Thomas S. Colvin, Douglas L. Karlen, D. Karlen, 1997 .

Identifying spatial patterns of erosion for use in precision conservation

J. Ritchie, D. Karlen, G. McCarty, 2005 .

ANALYSIS OFWATER STRESS EFFECTS CAUSING SPATIAL YIELD VARIABILITY IN SOYBEANS

Thomas S. Colvin, William D. Batchelor, Douglas L. Karlen, 1998 .

Grain Yield Mapping: Yield Sensing, Yield Reconstruction, and Errors

Thomas S. Colvin, Selcuk Arslan, S. Arslan, 2002, Precision Agriculture.

Soil Property Contributions to Yield Variation Patterns

Thomas S. Colvin, Douglas L. Karlen, Thomas C. Kaspar, 1996 .

Tilth index: an approach to quantifying soil tilth.

D. C. Erbach, T. S. Colvin, K. K. Singh, 1992 .

A Point-Injector Applicator to Improve Fertilizer Management

S. J. Marley, T. S. Colvin, J. L. Baker, 1989 .

Prediction of NO3-N losses with subsurface drainage water from manured and UAN-fertilized plots using GLEAMS

Thomas S. Colvin, Lajpat R. Ahuja, Allah Bakhsh, 2000 .

Predicting Field Tractability with a Simulation Model

S. J. Marley, T. S. Colvin, A. S. Babeir, 1986 .

Corn Response to Late-Spring Nitrogen Management in the Walnut Creek Watershed

Glen R. Rippke, C. Hurburgh, D. Karlen, 2005 .

Socioeconomic Aspects of Machinery Requirements for Rotational Agriculture

W. D. Kemper, D. Erbach, T. Colvin, 1990 .

Using Soil Attributes and GIS for Interpretation of Spatial Variability in Yield

Thomas S. Colvin, Allah Bakhsh, Rameshwar S. Kanwar, 2000 .

Laboratory test stand for combine grain yield monitors

Thomas S. Colvin, Selcuk Arslan, S. Arslan, 1998 .

Satellite Based Positioning System for Farm Equipment

T. Colvin, J. Ambuel, K. Jeyapalan, 1991 .

Crop Yield Variability as Influenced by Water in Rain-Fed Agriculture

D. Meek, M. Milner, D. James, 2015 .

Tillage-induced changes in the physical properties of soil

S. J. Marley, T. Colvin, H. Rizvi, 1991 .

Tillage Implement Effects on Corn and Soybean Residue

J. M. Laflen, T. S. Colvin, D. C. Erbach, 1986 .

An Evaluation of the Response of Yield Monitors and Combines to Varying Yields

Thomas S. Colvin, Selcuk Arslan, S. Arslan, 2002, Precision Agriculture.