Arable land use worldwide grew 33% between the 1960’s and the 2000’s, contributing greatly to the improved food supply. But, we’re running out of new places to farm. The Food and Ag. Organization of the U.N. says arable land in use will only grow 3.3^ in the next 20 years, with most growth in South America, India and Africa.
Developed countries, like the U.S.A. will see losses in arable farmland. Nearly all increases in crop production will come from yield-per-acre increases.
Lack of water reserves will limit new lands put under irrigation, although better irrigation technology will improve water efficiency.
With the threat of greater world population, the conservation of good farmland in the U.S.A. is more critical than ever, and will remain so.
Successful Farming, agriculture.com, October, 2013