grabbed calorie info from Wolfram Alpha: https://docs.google.com/spreadsheets/d/1Z7ROa1oI7H4jQMH1j5csEnOehXOpf0sTjrdnKMnYpPA/ https://docs.google.com/spreadshee

grabbed calorie info from Wolfram Alpha: https://docs.google.com/spreadsheets/d/1Z7ROa1oI7H4jQMH1j5csEnOehXOpf0sTjrdnKMnYpPA/ https://docs.google.com/spreadsheets/d/1Z7ROa1oI7H4jQMH1j5cs... IIRC, crop rotation and soil depletion has a few more variables to account for-- soil type, current nutrients, what you are/aren't willing to fertilize with. Potatoes for example should need 220 lbs nitrogen/yr [1] and soybeans or peanuts should be able to put that back after a year [2]. 1: http://www.extension.uidaho.edu/nutrient/crop_nutrient/potato.html http://www.extension.uidaho.edu/nutrient/crop_nutrient/potat... 2: http://aces.nmsu.edu/pubs/_a/A129/ http://aces.nmsu.edu/pubs/_a/A129/