John E. Sawyer

Best Publications

• Integrating plant litter quality, soil organic matter stabilization, and the carbon saturation concept

  Michael J. Castellano;Kevin E. Mueller;Daniel C. Olk;John E. Sawyer

  724
  Citations

• Strengths and limitations of Nitrogen rate recommendations for corn and opportunities for improvement

  Thomas F. Morris;T. Scott Murrell;Douglas B. Beegle;James J. Camberato

  347
  Citations

• Concepts of Variable Rate Technology with Considerations for Fertilizer Application

  J. E. Sawyer

  343
  Citations

• Concepts and Rationale for Regional Nitrogen Rate Guidelines for Corn

  John Sawyer;Emerson Nafziger;Gyles Randall;Larry Bundy

  317
  Citations

• Maximum soil organic carbon storage in Midwest U.S. cropping systems when crops are optimally nitrogen-fertilized.

  Hanna J. Poffenbarger;Daniel W. Barker;Matthew J. Helmers;Fernando E. Miguez

  188
  Citations

• Using Relative Chlorophyll Meter Values to Determine Nitrogen Application Rates for Corn

  J. A. Hawkins;J. E. Sawyer;D. W. Barker;J. P. Lundvall

  164
  Citations

• A long‐term nitrogen fertilizer gradient has little effect on soil organic matter in a high‐intensity maize production system

  Kimberly H. Brown;Elizabeth M. Bach;Rhae A. Drijber;Kirsten S. Hofmockel

  163
  Citations

• Nitrogen application to soybean at early reproductive development

  Daniel W. Barker;John E. Sawyer

  163
  Citations

• Effect of nitrogen fertilizer application on growing season soil carbon dioxide emission in a corn-soybean rotation.

  Mahdi M. Al-Kaisi;Marc L. Kruse;John E. Sawyer

  163
  Citations

• Modeling Long-Term Corn Yield Response to Nitrogen Rate and Crop Rotation

  Laila Alejandra Puntel;John E. Sawyer;Daniel W. Barker;Ranae Dietzel

  160
  Citations

• Drought Impact on Crop Production and the Soil Environment: 2012 Experiences from Iowa

  Mahdi Al-Kaisi;Roger Elmore;Jose Guzman;Mark Hanna

  157
  Citations

• Cover Crop Effects on Nitrous Oxide Emissions: Role of Mineralizable Carbon

  David C. Mitchell;Michael J. Castellano;John E. Sawyer;Jose Pantoja

  156
  Citations

• Understanding the DayCent model

  Magdalena Necpálová;Robert P. Anex;Michael N. Fienen;Stephen J. Del Grosso

  151
  Citations

• Nitrogen Fertilizer Suppresses Mineralization of Soil Organic Matter in Maize Agroecosystems

  Navreet K. Mahal;William R. Osterholz;Fernando E. Miguez;Hanna J. Poffenbarger

  132
  Citations

• Corn Nitrogen Fertilization Requirement and Corn–Soybean Productivity with a Rye Cover Crop

  Jose L. Pantoja;Krishna P. Woli;John E. Sawyer;Daniel W. Barker

  132
  Citations

• A General Guide for Crop Nutrient and Limestone Recommendations in Iowa

  Antonio P. Mallarino;John E. Sawyer;Stephen K. Barnhart

  127
  Citations

• Using Active Canopy Sensors to Quantify Corn Nitrogen Stress and Nitrogen Application Rate

  Daniel W. Barker;John E. Sawyer

  122
  Citations

• Use of Anaerobically Digested Swine Manure as a Nitrogen Source in Corn Production

  Esteban R. Loria;John E. Sawyer;Daniel W. Barker;John P. Lundvall

  118
  Citations

• Phosphorus indexing for cropland: Overview and basic concepts of the Iowa phosphorus index

  A. P. Mallarino;B. M. Stewart;J. L. Baker;J. D. Downing

  115
  Citations

• Extractable Soil Phosphorus and Inorganic Nitrogen following Application of Raw and Anaerobically Digested Swine Manure

  Esteban R. Loria;Esteban R. Loria;John E. Sawyer

  111
  Citations

• Soil water during the drought of 2012 as affected by rye cover crops in fields in Iowa and Indiana

  A.L. Daigh;M.J. Helmers;E. Kladivko;X. Zhou

  100
  Citations

• Evaluation of the Illinois Soil Nitrogen Test in the North Central Region of the United States

  C. A. M. Laboski;J. E. Sawyer;D. T. Walters;L. G. Bundy

  69
  Citations