Alt-Tech 147 Soil Science History of the New World

Brevik, E. C., Fenton, T. E., & Homburg, J. A. (2016). Historical highlights in American soil science — Prehistory to the 1970s. Catena, 146, 111–127. https://doi.org/10.1016/j.catena.2015.10.003

https://www.almanac.com/content/three-sisters-corn-bean-and-squash