Projects per year
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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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
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Projects
- 2 Finished
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ADAPTIVE MANAGEMENT FOR IMPROVED NUTRIENT MANAGEMENT
Spargo, J. T. (PI)
National Institute of Food and Agriculture
10/1/12 → 9/30/13
Project: Research project
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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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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 Access -
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 -
Soil test phosphorus predicts field-level but not subfield-level corn yield response
Reed, V., Fridgen, J., Finch, B., Spargo, J., McGrath, J., Bowen, J. M., Hahn, G., Smith, D. & Ritchey, E., Jan 1 2025, In: Agronomy Journal. 117, 1, e270028.Research output: Contribution to journal › Article › peer-review
Open Access -
The Fertilizer Recommendation Support Tool: A relational database and decision interface tool
Bourns, M., Buol, G., Spargo, J. T., Gatiboni, L., Yost, M. A., Slaton, N. A. & Osmond, D. L., Jun 2025, In: Agricultural and Environmental Letters. 10, 1, e70016.Research output: Contribution to journal › Article › peer-review
Open Access -
Accumulation of cadmium in soils, litter and leaves in cacao farms in the North Sierra Nevada de Santa Marta, Colombia
Guarín, D., Martín-López, J. M., Libohova, Z., Benavides-Bolaños, J., Maximova, S. N., Guiltinan, M. J., Spargo, J., da Silva, M., Fernandez, A. & Drohan, P., Mar 2024, In: Geoderma Regional. 36, e00762.Research output: Contribution to journal › Article › peer-review
7 Scopus citations