6 . 110 developed for the composition of the colony diet. Some basic considerations for the design of agricultural areas are developed. The range of materials and wastes that must be recycled is defined. VI.11.2: Nutritional Requirements: The basic parameters for colony food production are human nutritional requirements of grain, fruits, vegetables, meat, legumes, milk, eggs, and salt. Typical United States grain consumption amounts to 120 grams per person per day and about 2000 g/person-day indirect. Since much of this indirect consumption is inefficiently and unnecessarily used to fatten food animals, the overall design here allows 500 g/person-day of grain containing 30 grams of protein (6.4). Assuming a wide variety of fruits and vegetables and different yields, the allotment per person per day is 750 grams. This provides 10 grams of protein (6.4). Forty grams of protein can be provided by 143 g/person-day of meat from high-productivity animals. Twenty-five hundred g/personday of goat milk yields 64 grams protein, and another 5 grams of protein can be found in 15 g/person-day of chicken eggs (6.4). Therefore, the total required food mass per day for each person is 3658 grams, yielding 149 grams of protein. Thirty-five kg of water per person is also provided for irrigation and drinking (6.4). VI.11.3: Food Production - Nutrients and Growth Medium: Meeting the nutritional requirements at LS is much more complex than doing so in Chicago or central Nebraska. However, there are some factors in its favor. There is an unlimited source of energy; it has been shown that plants can thrive in lunar soil if it is properly treated, and the colony has gravity, eliminating potential problems of plant orientation. There is more than enough cylindrical area to grow sufficient food for the projected population of 1000 even with average crop yields. In fact, over 1500 could easily be fed if the entire cylinder were planted and used to raise food animals. There are problems inherent in agriculture that are greatly magnified in space. Plants require energy, a growth medium, water, mineral nutrients, and carbon usually supplied in the form of carbon dioxide (6 .16).
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