Organic methods, which rely on crop rotation, manure and compost in place of fertiliser, are far less intensive.

ECONOMIST: Ethical food

Solar panels sparkle on the barn roof, and cow manure becomes compost.

WSJ: For the aging, a commune-like alternative in NY

Roundup Ready herbicides and nitrogen fertilizers replaced manure and compost.

FORBES: The New Green Revolution: A Vision For Small-Scale Urban Farming