In 2007,over 150 million hectares of maize were planted worldwide,with a yield of 4970.9 kilogram/hectare. 。 While the United States produces almost half of the world's harvest (~42.5%),(332 million tonnes annually in the United States alone,800 million tonnes whole world in 2007).other top producing countries include China, Brazil,Mexico,Argentina,India and France. ■RAGE Copyright reseved by Long Ming College of animal science,Northwest Agriculture Forestry University 西北农林科技大学动物科技学院草业科学系 __________________________________________________________________ College of animal science, Northwest Agriculture & Forestry University  西北农林科技大学动物科技学院草业科学系 Copyright reseved by Long Mingxiu  • In 2007, over 150 million hectares of  maize were planted worldwide, with a  yield of 4970.9 kilogram/hectare. • While the United States produces  almost half of the world's harvest  (~42.5%), (332 million tonnes annually  in the United States alone,800 million tonnes  whole world in 2007). other top producing countries include China, Brazil, Mexico, Argentina, India and France