FAO – Food & Agriculture Organization [to 20 December 2014]
http://www.fao.org/news/archive/news-by-date/2014/en/

Maize, rice, wheat farming must become more sustainable
FAO estimates that over the next 35 years farmers will need to increase the annual production of maize, rice and wheat to 3 billion tonnes. Experts say this can only be achieved through eco-friendly agriculture that results in higher productivity while conserving natural resources, adapting to climate change, and delivering economic benefits to the world’s 500 million small-scale family farms.
19-12-2014