NOVELTY - A system, comprises a harvested plant material degradation system (4); a microbial growth system (10) in fluid contact with the harvested plant material degradation system; and an intermediary animal system (14) in biomass-transfer interaction with the microbial growth system.    USE - For producing food or feed; for providing concentrated microbial biomass for consumption by intermediary animal such as worms, annelids, arthropods, mollusks and/or fish for consumption by product animal including crustacean, mollusk, fish, bird, pig, goat and cow (claimed), and for human consumption.    ADVANTAGE - The method produces food while sequestering large amounts of carbon compared to modern agriculture. The method does not use cultivation or pesticides, and sequesters significant amounts of carbon in a food production practice. The system can be used to produce food from land which currently contains a wetland or is forested, and does not currently produce a significant source of food for human consumption. The system can eliminate, or minimize pollution of ground and surface waters with nutrients, pesticides and other chemical compounds. The system produces food and/or feed in a manner, which does not cause significant pollution to the general environment, and sequesters large quantities of carbon, thereby reducing the impact of atmospheric carbon dioxide on global warming. In the system, the plant material can be periodically harvested from an environment and this can be performed at a time and in a manner that minimizes the disruption of wildlife that uses that environment. By harvesting plant material that originates from a plant polyculture growing in an environment, the erosion of topsoil can be reduced and the nutrient and pesticide pollution associated with non point source agricultural runoff can be significantly limited. Land producing a polyculture of plant material can be more agriculturally productive since cultivation is not required, therefore the terrain does not need to be substantially flat.    DETAILED DESCRIPTION - A system, comprises a harvested plant material degradation system (4); a microbial growth system (10) in fluid contact with the harvested plant material degradation system; and an intermediary animal system (14) in biomass-transfer interaction with the microbial growth system. The harvested plant material degradation system is a substrate for the microbial growth system, and contains polyculture plant material that is contacted with an aqueous-based liquid by submerging the polyculture plant material within the aqueous-based liquid, or with a microbial inoculation and/or nutrients. The microbial growth system comprises a fixed film and/or suspended growth system; and promotes growth of microbes in aerobic, anaerobic, and/or anoxic environments. The microbial growth system produces a concentrated biomass having a concentration of at least 108 microbes per milliliter. The concentrated biomass can be concentrated by gravity settling, filtration, and/or centrifugation. The intermediary animal system comprises intermediary animals for consuming a concentrated biomass produced in the microbial growth system. The system further comprises a harvesting system; and a product animal. INDEPENDENT CLAIMS are included for the following:    (1) a process for producing food involving microbially degrading harvested polyculture plant material to form a concentrated microbial biomass; providing the concentrated microbial biomass to an intermediary animal; and contacting the harvested polyculture plant material with a microbial inoculation and/or nutrients;    (2) a food produced by the method; and    (3) producing a product animal, involving providing product animal growth area, a harvested plant material collection area, and a microbial growth system; directing waste from outlet of product animal growth area to the harvested plant material collection area; directing degradation products from harvested plant material collection area outlet to microbial growth system; directing microbial biomass to intermediary animal; and directing intermediary animal to product animal growth area for consumption by the product animal.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the system for producing food.    Harvested plant material (2)    Harvested plant material degradation system (4)    Non-biodegradable residues (6)    Microbial growth system (10)    Intermediary animal system. (14)