John L Havlin

Survey of Seasonal Variation of Leaf Tissue Nutrient Concentration of Southeastern Blackberry

Lay-Walters, A., Samtani, J., Fernandez, G., Havlin, J., Coneva, E., Stafne, E., … McWhirt, A. (2025, September 23). HortScience, Vol. 60, pp. 1928–1937.

Long‐term yield response of corn, wheat, and double‐crop soybean to tillage and N placement

Sweeney, D. W., Diaz, D. A. R., Pedreira, B. C., & Havlin, J. L. (2022, January 3). Agronomy Journal.

Nutrient Management Effects on Wine Grape Tissue Nutrient Content

Havlin, J. L., Austin, R., Hardy, D., Howard, A., & Heitman, J. L. (2022, January 7). Plants, Vol. 1.

Review of Phosphite as a Plant Nutrient and Fungicide

Havlin, J. L., & Schlegel, A. J. (2021, August 30). Soil Systems.

Irrigated grain sorghum response to 55 years of nitrogen, phosphorus, and potassium fertilization

Schlegel, A. J., & Havlin, J. L. (2020, September 18). Agronomy Journal.

Soil Fertility Management for Better Crop Production

Havlin, J., & Heiniger, R. (2020, September 8). Agronomy, Vol. 10.

Upscaling Evapotranspiration with Parsimonious Models in a North Carolina Vineyard

Agronomy, 9(3), 152.

Corn Yield and Grain Nutrient Uptake from 50 Years of Nitrogen and Phosphorus Fertilization

Schlegel, A. J., & Havlin, J. L. (2016, November 17). Agronomy Journal.

Nitrogen and Phosphorus Fertilizer Effects on Establishment of Giant Miscanthus

Haines, S. A., Gehl, R. J., Havlin, J. L., & Ranney, T. G. (2014, June 30). BioEnergy Research, Vol. 8, pp. 17–27.

Micro-Bowen ratio system for measuring evapotranspiration in a vineyard interrow

Holland, S., Heitman, J. L., Howard, A., Sauer, T. J., Giese, W., Ben-Gal, A., … Havlin, J. (2013, May 14). Agricultural and Forest Meteorology, Vol. 177, pp. 93–100.

Soil fertility and fertilizers: An introduction to nutrient management

Upper Saddle River, N.J.: Pearson.

Survey of Nutrient Status inVitis viniferaGrapes in North Carolina

Havlin, J. L., Hardy, D. H., Gehl, R. J., & Spayd, S. E. (2012, January 1). Communications in Soil Science and Plant Analysis.

The “Dig It!” Smithsonian Soils Exhibition: Lessons Learned and Goals for the Future

Drohan, P. J., Havlin, J. L., Megonigal, J. P., & Cheng, H. H. (2010, April 21). Soil Science Society of America Journal.

Trends in Soil Science Education and Employment

Havlin, J., Balster, N., Chapman, S., Ferris, D., Thompson, T., & Smith, T. (2010, August 26). Soil Science Society of America Journal.

“Dig It!”: How an Exhibit Breathed Life into Soils Education

Megonigal, J. P., Stauffer, B., Starrs, S., Pekarik, A., Drohan, P., & Havlin, J. (2010, April 21). Soil Science Society of America Journal.

A variable-rate decision support tool

Havlin, J. L., & Heiniger, R. W. (2009, April 21). Precision Agriculture, Vol. 10, pp. 356–369.

Three Experimental Systems to Evaluate Phosphorus Supply from Enhanced Granulated Manure Ash

Crozier, C. R., Havlin, J. L., Hoyt, G. D., Rideout, J. W., & McDaniel, R. (2009, July 1). Agronomy Journal.

Effect of planting date and nitrogen fertilization rates on no-till pumpkins

HortScience, 43(3), 857–861.

Long-term Agricultural Research: A Research, Education, and Extension Imperative

Robertson, G. P., Allen, V. G., Boody, G., Boose, E. R., Creamer, N. G., Drinkwater, L. E., … Wall, D. H. (2008, July 1). BioScience.

Effect of winter cover crop residue on no-till pumpkin yield

HortScience, 42(7), 1568–1574.

Change in Soluble Phosphorus in Soils following Fertilization is Dependent on Initial Mehlich‐3 Phosphorus

Bond, C. R., Maguire, R. O., & Havlin, J. L. (2006, August 9). Journal of Environmental Quality.

Challenging Approaches to Nitrogen Fertilizer Recommendations in Continuous Cropping Systems in the Great Plains

Schlegel, A. J., Grant, C. A., & Havlin, J. L. (2005, March 1). Agronomy Journal.

Soil fertility and fertilizers: An introduction to nutrient management (7th ed.)

Upper Saddle River, NJ: Pearson/Prentice Hall.

Placement of UAN for Dryland Winter Wheat in the Central High Plains

Schlegel, A. J., Dhuyvetter, K. C., & Havlin, J. L. (2003, November 1). Agronomy Journal.

Corn Yield Response to Nitrogen at Multiple In-Field Locations

Schmidt, J. P., DeJoia, A. J., Ferguson, R. B., Taylor, R. K., Young, R. K., & Havlin, J. L. (2002, January 1). Agronomy Journal.

Seeing is believing: The role of field days and tours in precision agriculture education

Precision Agriculture, 3(4), 309.

USING YIELD MONITOR DATA TO DETERMINE SPATI AL CROP PRODUCTION POTENTIAL

Taylor, N. R. K., Kluitenberg, N. G. J., Schrock, N. M. D., Zhang, N. N., Schmidt, N. J. P., & Havlin, N. J. L. (2001, January 1). Transactions of the ASAE.

Precision farming education at NC State University

Proceedings of the 5th International Conference on Precision Agriculture, Bloomington, Minnesota, USA, 16-19 July, 2000, 1.

The Spatial Information Research Laboratory at North Carolina State University

Proceedings of the 5th International Conference on Precision Agriculture, Bloomington, Minnesota, USA, 16-19 July, 2000, 1.

Soil fertility and fertilizers: An introduction to nutrient management

Medford, NJ: Prentice Hall.

Dryland conservation technologies: Enhancing agricultural profitability and sustainability

Annals of Arid Zone, 36(3), 291–303.

Green Fallow for the Central Great Plains

Schlegel, A. J., & Havlin, J. L. (1997, September 1). Agronomy Journal.

Nutrient management for sustainable dryland farming systems

Annals of Arid Zone, 36(3), 233–254.