Wow. Awesome way to build a cellar.
Filling up the "root cellar". old fridge buried in the ground.
How to Store Root Vegetables in Boxes to use throughout winter.
Curing Garlic: Garlic does need to cure in order to store - but you can accomplish this by setting them out in the sun on an old screen window where the air can circulate above and below for 4-5 days after you dig them. No need for boxes and fans - (unless you live in a really humid area then it would be helpful).
Smoke house plans
Do it yourself shelter @Survival
How to Build a Root Cellar for Food Storage...You can build a root cellar that acts as a refrigerator in the spring and summer and a safe-from-freezing pantry in the fall and winter.
Burying a freezer to use as a make-do root cellar.