World's Best Scientists 2026 revealed!

D-Index & Metrics

Plant Science and Agronomy

D-Index
40
Citations
7069
World Ranking
3871
National Ranking
963

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

  • 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

  • Concepts of Variable Rate Technology with Considerations for Fertilizer Application

    J. E. Sawyer

  • Concepts and Rationale for Regional Nitrogen Rate Guidelines for Corn

    John Sawyer;Emerson Nafziger;Gyles Randall;Larry Bundy

  • 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

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

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

  • 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

  • Nitrogen application to soybean at early reproductive development

    Daniel W. Barker;John E. Sawyer

  • 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

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

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

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

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

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

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

  • Understanding the DayCent model

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

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

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

  • 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

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

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

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

    Daniel W. Barker;John E. Sawyer

  • 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

  • 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

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

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

  • 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

  • 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

Frequent Co-Authors

Antonio P. Mallarino
Antonio P. Mallarino Iowa State University
Emerson D. Nafziger
Emerson D. Nafziger University of Illinois at Urbana-Champaign
Richard B. Ferguson
Richard B. Ferguson University of Nebraska–Lincoln
Newell R. Kitchen
Newell R. Kitchen Agricultural Research Service
Matthew J. Helmers
Matthew J. Helmers Iowa State University
Carl J. Rosen
Carl J. Rosen University of Minnesota
Andrew W. Lenssen
Andrew W. Lenssen Iowa State University
Larry G. Bundy
Larry G. Bundy University of Wisconsin–Madison
Sotirios V. Archontoulis
Sotirios V. Archontoulis Iowa State University
Johan Six
Johan Six ETH Zurich

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