Pillars of Agricultural Literacy
First is a link on the subject: http://www.agfoundation.org/files/final_pillars_packet.pdf
Note it is in pdf format and 9 pages long.
The intent is to realize that most recommendations as to diets usually reflect “good times” kind of diets.
To date, I cannot find any recommended diet that I trust for any kind of hard times, which includes things like farming, the ground military, and any other kind of hard times situation, like football, both American and even International, or even sweating a lot in an airplane.
Given that most diets are situational dependent, like the circumstances will probably vary all over the place, there is not one size fits all in my opinion. That also includes things like you sex, and even if you are nursing or not.
Two obvious examples follow: During good times one should probably keep their sodium input down to recommended levels, but when outdoors sweating a lot, one should increase their sodium input, along with lots of clean water, too. Humans need adequate sodium (usually with some potassium, too) to live. Even our deer often benefit from salt licks. In the same vein, humans need some fat in their diet to best live, and one should try adjust that amount to their situation. Now one can get their fat from many sources, in other words, fat is usually found in many diets, and should be thought of that way.
Now the Marine training kicks in, too. Do not sacrifice yourself for the sake of others, like your children. We all count in our own ways, and not getting sick from malnutrition is one way to show that.
Last, all this assumes you have access to fat in your diet. Sometimes we won’t have access, but then the idea of barter and community then kicks in. So even count yourself lucky if you are overweight, because that might just get you through the initial transition to any kind of hard times diet. In the interim, do try live as healthy and at the proper weight as you can. Chances are we will even have “diminished” times, which to me means access to fat in our diets.