Re food insecurity I like to keep an eye on the big picture. So long as the land itself produces enough, currency and distribution can be manipulated and no one need go hungry. But, is the land producing enough... ?
http://www.earth-policy.org/indicators/C54
That's great you want to discuss crop yields and such, but food insecurity as the USDA refers to it is whether there is food on the shelf and people can't afford it. And there is, and they can't.
