Plant mineral nutrition animation
http://www.kscience.co.uk/animations/minerals.htm
USDA soil map
https://casoilresource.lawr.ucdavis.edu/gmap/
dust bowl PBS
https://www.youtube.com/watch?v=guTek7ipD4U&list=PLzkQfVIJun2Kl_ZEVTYA-qXlloRYQP3kv&index=11