What makes yams a top survival crop?

Our yams (Dioscorea spp.) have had no pest or disease issues and are easy to grow, making them a very good survival crop, as I cover in these books:

Florida Survival Gardening: https://amzn.to/3NchEil

Totally Crazy Easy Florida Gardening: https://amzn.to/3Nau2zm

The Huge 2nd edition of Create your Own Florida Food Forest: https://amzn.to/3Rs08ZY

The South Florida Gardening Survival Guide: https://amzn.to/3uNkZOE

And here are some the yam articles posted at The Survival Gardener website: https://www.thesurvivalgardener.com/?...

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Compost Your Enemies tshirts: https://www.aardvarktees.com/products...

David's gardening blog: http://www.thesurvivalgardener.com

Growing yams is easy once you know a few tricks. Today I talk about why yams are a good survival crop, how yams can replace potatoes, how yams are starchy, not sweet, how yams can be propagated, and yam varieties that grow up north as well as yam varieties for zone 8.