The epicenters of innovation that epitomize employment and economic growth continuously shift, moving from Omaha (farming), to Pittsburgh (steel), to Detroit (automotive), to even Hollywood (entertainment), San Jose (silicon), and Seattle (software).

FORBES: Clean Energy Driven Job Growth Is A Return To The Stone Age

The study detects a shift from field crops towards higher-value horticulture and livestock farming.

ECONOMIST: South African farming

And herbicide tolerance has made possible a shift to more benign herbicides and to environment-friendly no-till farming.

FORBES: Magazine Article