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APA Citation
Obrycki, J. F., Kovar, J. L., & Karlen, D. L. (2018). subsoil Potassium in Central Iowa Soils: Status and Future Challenges. Agrosystems, geosciences & environment, 1(1), 1–8. http://access.bl.uk/ark:/81055/vdc_100099465364.0x000001