D. Wittry

发表

Comparison of Uniform‐ and Variable‐Rate Phosphorus Fertilization for Corn–Soybean Rotations

Antonio P. Mallarino, David J. Wittry, A. Mallarino, 2004, Agronomy Journal.

Efficacy of Grid and Zone Soil Sampling Approaches for Site-Specific Assessment of Phosphorus, Potassium, pH, and Organic Matter

Antonio P. Mallarino, David J. Wittry, A. Mallarino, 2004, Precision Agriculture.

Crop Yield and Soil Phosphorus as Affected by Liquid Swine Manure Phosphorus Application Using Variable-Rate Technology

A. Mallarino, D. Wittry, 2010 .

Use of DGPs, Yield Monitors, Soil Testing, and Variable Rate Technology to Improve Phosphorus and Potassium Management

A. Mallarino, D. Wittry, 1997 .

Variation in Soybean Response to Early Season Foliar Fertilization among and within Fields

A. Mallarino, M. Haq, D. Wittry, 2001 .

Soil phosphorus, management practices, and their relationship to phosphorus delivery in the Iowa Clear Lake agricultural watershed.

David J. Wittry, J. Downing, A. Mallarino, 2003, Journal of environmental quality.

Use of variable-rate technology for agronomic and environmental phosphorus-based liquid swine manure management.

P. Robert, A. Mallarino, D. Wittry, 2003 .

Uniform and variable-rate fertilizer and manure phosphorus for the corn-soybean rotation

D. Wittry, 2002 .

Variable-Rate Application for Phosphorus and Potassium: Impacts on Yield and Nutrient Management

David J. Wittry, A. Mallarino, D. Wittry, 2006 .

IOWA SOIL-TEST FIELD CALIBRATION RESEARCH UPDATE: POTASSIUM AND THE MEHLICH-3 ICP PHOSPHORUS TEST

A. Mallarino, D. Wittry, Pedro A. Barbagelata, 2002 .

SOIL-TEST POTASSIUM FIELD CALIBRATIONS FOR SOYBEAN IOWA INTERPRETATIONS AND RESEARCH UPDATE

A. Mallarino, D. Wittry, Pedro A. Barbagelata, 2004 .

Timing of broadcast phosphorus fertilization for no-till corn and soybean

A. Mallarino, D. Wittry, J. Prater, 2009 .

SWINE MANURE PHOSPHORUS USE FOR CROP PRODUCTION IN IOWA

A. Mallarino, D. Wittry, Mónica M. Barbazán, 2005 .

Variable‐Rate Phosphorus Fertilization: On‐Farm Research Methods and Evaluation for Corn and Soybean

Antonio P. Mallarino, David J. Wittry, P. N. Hinz, 1999 .

Alternative data managements and interpretations for strip trials harvested with yield monitors.

Antonio P. Mallarino, Manuel Bermudez, David J. Wittry, 2000 .

Evaluation of soil sampling strategies for soil tests and of variable-rate fertilization for phosphorus in Iowa soils

D. Wittry, 1998 .