John T. Spargo - Virginia Tech Department of Crop and Soil Environmental Sciences Smyth Hall Blacksburg VA 24061-0404 USA

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Improving a Nitrogen Mineralization Model for Predicting Unfertilized Corn Yield

Kathleen E. Arrington,Raziel A. Ordonez, Zoelie Rivera-Ocasio, Madeline Luthard, Sarah Tierney,John Spargo,Denise Finney,Jason Kaye,Charles White

SOIL SCIENCE SOCIETY OF AMERICA JOURNALno. 3 (2024): 905-920

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Accumulation of Cadmium in Soils, Litter and Leaves in Cacao Farms in the North Sierra Nevada De Santa Marta, Colombia

Daniel Guarin,Javier M. Martin-Lopez,Zamir Libohova, Jhony Benavides-Bolanos,Siela N. Maximova,Mark J. Guiltinan,John Spargo,Mayesse da Silva,Alejandro Fernandez,Patrick Drohan

GEODERMA REGIONAL（2024）

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A spreadsheet for determining critical soil test values using the modified arcsine-log calibration curve

Carl H. Bolster,Adrian A. Correndo,Austin W. Pearce,John T. Spargo,Nathan A. Slaton,Deanna L. Osmond

SOIL SCIENCE SOCIETY OF AMERICA JOURNAL（2023）

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Monolith Soil Core Sampling to Develop Nitrate Testing Protocol for Manure Injection

Robert J. Meinen,Douglas B. Beegle,Siddharth Vishwanath,Peter J. A. Kleinman,Louis S. Saporito,John Spargo,Heather Karsten, Justin Dillon

SOIL SCIENCE SOCIETY OF AMERICA JOURNALno. 2 (2023): 378-389

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Managing Cover Crop C:N Ratio and Subsurface‐banded Poultry Litter Rate for Optimal Corn Yields

Steven B. Mirsky,Brian W. Davis,Hanna Poffenbarger,Michel A. Cavigelli,Jude E. Maul,Harry Schomberg,John T. Spargo,Resham Thapa

Agronomy Journalno. 4 (2023): 1746-1761

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Current Status of US Soil Test Phosphorus and Potassium Recommendations and Analytical Methods

Sarah E. Lyons,Jason D. Clark,Deanna L. Osmond,M. D. Rasel Parvej,Austin W. Pearce,Nathan A. Slaton,John T. Spargo

Soil Science Society of America journal（2023）

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Recalibrating the Pennsylvania Pre-Sidedress Soil Nitrate Test Recommendations for Modern Corn Production

Charles M. M. White,Sailesh Sigdel,Heather D. D. Karsten,Robert J. J. Meinen,John T. T. Spargo

Agronomy journalno. 5 (2023): 2600-2613

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Cadmium Contamination in Cacao Farms of Piura, North Peru: A Comprehensive Assessment of Geogenic and Anthropogenic Sources and Implications for Future Production

Daniel Guarín,Nadia Rodríguez Hamamura, Jesús Blancas Cortez,Jhony Benavides,John Spargo,Mark Guiltinan,Siela Maximova,Otilia Acha de la Cruz,Patrick J. Drohan

Environmental Challenges (2023): 100765

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Defining Relative Yield for Soil Test Correlation and Calibration Trials in the Fertilizer Recommendation Support Tool

Austin W. Pearce,Nathan A. Slaton,Sarah E. Lyons,Carl H. Bolster,Tom W. Bruulsema,John H. Grove,John D. Jones,Josh M. McGrath,Fernando E. Miguez,Nathan O. Nelson,Deanna L. Osmond,Md Rasel Parvej,Eugenia M. Pena-Yewtukhiw,John T. Spargo

SOIL SCIENCE SOCIETY OF AMERICA JOURNAL（2022）

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Minimum dataset and metadata guidelines for soil-test correlation and calibration research

Nathan A. Slaton,Sarah E. Lyons,Deanna L. Osmond,Sylvie M. Brouder,Steve W. Culman,Gerson Drescher,Luciano C. Gatiboni, John Hoben,Peter J. A. Kleinman,Joshua M. McGrath,Robert O. Miller,Austin Pearce,Amy L. Shober,John T. Spargo,Jeff J. Volenec

SOIL SCIENCE SOCIETY OF AMERICA JOURNAL（2022）

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