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Resources

Aguirre, E., Leménager, D., Bacaicoa, E., Fuentes, M., Baigorri, R., Zamarreño, A.M., & García-Mina, J.M. (2009). The root application of a purified leonardite humic acid modifies the transcriptional regulation of the main physiological root responses to Fe deficiency in Fe-sufficient cucumber roots. Plant Physiol Biochem 47(3):215–223.
https://doi.org/10.1016/j.plaphy.2008.11.013

Ahmed, O. H., Aminuddin, H., & Husni, M. H. A. (2006). Reducing ammonia loss from urea and improving soil-exchangeable ammonium retention through mixing triple superphosphate, humic acid and zeolite. Soil Use Manag. 22, 315–319.
https://doi.org/10.1111/j.1475-2743.2006.00040.x

Albayrak, S., & Camas, N. (2005). Effects of different levels and application times of humic acid on root and leaf yield and yield components of forage turnip (Brassica rapa). J Agron 4(2):130–133
https://doi.org/10.3923/ja.2005.130.133

Brownell, J.R., Nordstrom, G., Marihart, J., & Jorgensen, G. (1987). Crop responses from two new Leonardite extracts. Sci Total Environ 62:491–499.
https://doi.org/10.1016/0048-9697(87)90544-4

Canellas, L.P., Olivares, F.L., Aguiar, N.O., Jones, D.L., Nebbioso, A., Mazzei, P., & Piccolo, A. (2015). Humic and fulvic acids as biostimulants in horticulture. Scientia Horticulturae 196:15–27.
https://doi.org/10.1016/j.scienta.2015.09.013

Kwame, A., Malinda, S. T., & Linda, Y. G. (2022). Understanding the Role of Humic Acids on Crop Performance and Soil Health. Agron. 4.
http://dx.doi.org/10.3389/fagro.2022.848621

Olk, D.C., Dinnes, D.L., Callaway, C., & Raske, M. (2013). On-Farm Evaluation of a Humic Product in Iowa (US) Maize Production. In: Xu, J., Wu, J., He, Y. (eds) Functions of Natural Organic Matter in Changing Environment. Springer, Dordrecht.
https://doi.org/10.1007/978-94-007-5634-2_193

Olk, D.C., Dinnes, D.L., Rene Scoresby, J., Callaway, C.R., & Darlington, J.W. (2018). Humic products in agriculture: potential benefits and research challenges—a review. J Soils Sediments18, 2881–2891.
https://doi.org/10.1007/s11368-018-1916-4

Rose, M.T., Patti, A.F., Little, K.R., Brown, A.L., Jackson, W.R., & Cavagnaro, T.R. (2014). A meta-analysis and review of plant-growth response to humic substances: practical implications for agriculture. Adv Agron 124:37–89.
https://doi.org/10.1016/B978-0-12-800138-7.00002-4

Yang, F., Tang, C., & Antonietti, M. (2021). Natural and artificial humic substances to manage minerals, ions, water, and soil microorganisms. Chem. Soc. Rev. 50, 6221–6239. http://dx.doi.org/10.1039/D0CS01363C

Olk DC, Dinnes DL, Callaway CR. Maize Growth Responses to a Humic Product in Iowa Production Fields: An Extensive Approach. Front Plant Sci. 2022 Jan 10;12:778603. doi: 10.3389/fpls.2021.778603.
Olk et Al_ HA_Corn_Midwest.pdf