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43 Mulder, V.L., de Bruin, S., Schaepman, M. (2011). The Use of Remote Sensing in Soil and Terranin Mapping‐ A Review. Geoderma 162 (1–2): 1–19, https://doi.org/10.1016/j.geoderma.2010.12.018

44 Necpálová, M., Anex Jr., R.P., Kravchenko, A.N., Abendroth, L.J., Del Grosso, S.J., Dick, W.A., Helmers, M.J., Herzmann, D., Lauer, J.G., Nafziger, E.D., Sawyer, J.E., Scharf, P.C., Strock, J.S., and Villamil, M.B. (2014). What does it take to detect a change in soil carbon stock? A regional comparison of minimum detectable difference and experiment duration in the north central United States. J. Soil Water Conserv. 69(6), 517–531. doi:10.2489/jswc.69.6.517

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64 VeVerka, J.S., Udawatta, R.P., and Kremer, R.J. (2019). Soil health indicator responses on Missouri claypan soils affected by landscape position, depth, and management practices. J. Soil Water Conserv. 74(2), 126–137. doi:10.2489/jswc.74.2.126