Personal profile
Expertise related to UN Sustainable Development Goals
In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This person’s work contributes towards the following SDG(s):
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SDG 2 Zero Hunger -
SDG 11 Sustainable Cities and Communities -
SDG 13 Climate Action
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Dive into the research topics where John Thomas Spargo is active. These topic labels come from the works of this person. Together they form a unique fingerprint.
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Collaborations and top research areas from the last five years
Recent external collaboration on country/territory level. Dive into details by clicking on the dots or
Projects
- 1 Finished
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NORTHEAST COORDINATING COMMITTEE ON SOIL TESTING
Spargo, J. T. (PI)
National Institute of Food and Agriculture
10/1/12 → 9/30/13
Project: Research project
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Stakeholder perspectives on soil-test-based phosphorus and potassium fertilization in US agriculture
Bourns, M. A., Osmond, D. L., Slaton, N. A., Spargo, J. T., Gatiboni, L., Lacey, C., Sawyer, D. & Yost, M. A., Mar 1 2026, In: Agronomy Journal. 118, 2, e70379.Research output: Contribution to journal › Article › peer-review
Open Access -
Assessment of soil pH and lime requirement methods and recommended lime rates for six reference soils across US land grant institutions
Jones, J. D., Miller, R. O., Spargo, J. T., Sikora, F. J., Rakkar, M. K., Slaton, N. A. & Osmond, D. L., Sep 1 2025, In: Soil Science Society of America Journal. 89, 5, e70116.Research output: Contribution to journal › Review article › peer-review
Open Access1 Link opens in a new tab Scopus citations -
Delta yield predicts nitrogen fertilizer requirements for corn in US production systems
Ordóñez, R. A., White, C. M., Spargo, J. T., Kaye, J. P., Ruark, M., Iqbal, J., Shapiro, C. A., Thomason, W. E., Fiorellino, N. M., Thorne, L. A., Shober, A., Grove, J. H., Hirsh, S. M., Weil, R. R., Castellano, M. J., Archontoulis, S. V., Hatfield, J. J., Lee, C. D., Quinn, D. J. & Sanders, Z. P. & 12 others, , Sep 1 2025, In: Agronomy Journal. 117, 5, e70150.Research output: Contribution to journal › Article › peer-review
Open Access -
Nitrogen fertilizer rate not timing determines no-till corn yield following cereal rye cover crop in northeastern United States
Huddell, A. M., Davis, B., Richards, N., Tully, K., Thapa, R., Hashemi, M., VanGessel, M., Miller, J., Ketterings, Q. M., White, C., Roth, G., Spargo, J. T. & Mirsky, S. B., Dec 2025, In: Agricultural and Environmental Letters. 10, 2, e70041.Research output: Contribution to journal › Letter › peer-review
Open Access -
Soil fertility and plant nutrition
McGrath, J. M., Spargo, J., Penn, C. J. & Fiorellino, N. M., Jan 1 2025, Encyclopedia of Agriculture and Food Systems. Elsevier, p. V1:229-V1:251Research output: Chapter in Book/Report/Conference proceeding › Chapter