1 acre (both variants) is equal to the following customary units: 1  66 feet Ã 660 feet (43,560 square feet) 2  10 square chains (1 chain = 66 feet = 22 yards = 4 rods = 100 links) 3  1 acre is approximately 208.71 feet Ã 208.71 feet (a square) 4  4,840 square yards. 5  43,560 square feet. 6  160 perches.
Types of GMOs. GMO varieties exist for crops such as alfalfa, canola, corn, cotton, papaya, rice, soybean, sugar beet, summer squash, and tobacco. Currently, 95% of U.S. soybean and 90% of U.S. corn is genetically modified.
FastFeatures. Genetically modified organisms (GMOs) are food crops that have been engineered to increase yields, hardiness and resistance to herbicides. This genetic engineering creates plant, animal and bacteria food groups that do not occur in nature.