New York Times, October 14, 2010 

Wal-Mart Stores announced a program on Thursday that would focus on sustainable agriculture among its suppliers, as the retail giant tries to expand its efforts to improve environmental efficiency among its suppliers.

In emerging markets, Wal-Mart has pledged to sell $1 billion of food from small and medium farmers (which it defines as farmers with fewer than 20 hectares or about 50 acres). It will also provide training for the farmers and their laborers on how to choose  crops that are in demand as well as the proper application of water and pesticides.

Full story at http://www.nytimes.com/2010/10/15/business/15walmart.html?_r=1&hp [1]