Something to think about, Potatoes produce around 9 million calories per acre.
Corn produces around 7.5 million calories per acre. If we want to store corn in bulk, we can stockpile canned corn or store dried corn in mylar bags. A 14.75 ounce can of cream style sweet corn has 60 calories, a 15.25 ounce can of whole kernel corn has 60 calories – at least that is what the labels say on the cans of corn.
Rice comes in third with an estimated 7.4 million calories per acre. Rice is also a popular item to store in mylar bags. If we wanted to break it down to the details, a cup of rice contains about 216 calories.
Soybean 4th with around 2.8 million calories per acre. However, soybean leads the pack of all four in protein production per acre.