The results show that, worldwide, farms of less than 1 hectare account for 70 percent of all farms, but operate only 7 percent of all agricultural land. Slightly larger farms between 1 and 2 hectares account for 14 percent of all farms and control 4 percent of the land. Together, farms of less than 2 hectares account for 84 percent of all farms, but operate only around 12 percent of all agricultural land. Farms in the range of 2 to 5 hectares account for 10 percent of all farms and control 6 percent of the land. Interestingly, the largest 1 percent of farms in the world (those larger than 50 hectares) operate more than 70 percent of the world’s farmland.
http://www.fao.org/3/ca7036en/ca7036en.pdf
Quote with context:
The results show that, worldwide, farms of less than 1 hectare account for 70 percent of all farms, but operate only 7 percent of all agricultural land. Slightly larger farms between 1 and 2 hectares account for 14 percent of all farms and control 4 percent of the land. Together, farms of less than 2 hectares account for 84 percent of all farms, but operate only around 12 percent of all agricultural land. Farms in the range of 2 to 5 hectares account for 10 percent of all farms and control 6 percent of the land. Interestingly, the largest 1 percent of farms in the world (those larger than 50 hectares) operate more than 70 percent of the world’s farmland.
(there are 608 million farms in the world)