The last 5 or 6 paragraphs of this article hold the seed (pardon the pun) to the best techniques for world agriculture. Organic farming, along with diverse crops, builds healthy soil, reduces and eliminates pests, prevents pollution due to fertilizers, and eradicates farm debt. It also increases yield and prevents destruction of whole crops due to monoculture.
http://www.nationalgeographic.com/foodfeatures/green-revolution/
Marlene Dotterer 