Agriculture - Aerial view of a farmstead and cultivated farmland with a network of grassy waterways in the fields / near Taylor, Illinois, USA.

Agriculture - Aerial view of farmsteads and cultivated and fallow agricultural fields / near Fairview, Iowa, USA.

Agriculture - Aerial view of cultivated farmland in the high desert on the eastern slope of the Sierra Nevada along Pine Creek, Mt. Tom above / near Bishop, Inyo County, California, USA.

Agriculture - Aerial view of rolling fallow agricultural land in late afternoon light / near Woodbine, Iowa, USA.

Agriculture - Aerial view of fallow center pivot irrigated circular agricultural fields in Winter, with the Rocky Mountains in the background / San Luis Valley, Colorado, USA.

Agriculture - Aerial view of wheat fields in Autumn in various stages of growth, some areas ready for harvest and other areas post-harvest / Southwest Kansas, USA.

Agriculture - Aerial view of farmsteads and agricultural fields with grassy waterways that drain rainwater from the fields / near Winfield, Iowa, USA.

Agriculture - Aerial view of rolling agricultural land, the foreground field shows grassy waterways that drain rainwater from the field / near Colfax, Iowa, USA.

Agriculture - Romaine lettuce in the field / Salinas Valley, California, USA.

Agriculture - Treetop view of ripe Bing cherries on the tree with harvesting ladders in the background / near Linden, San Joaquin County, California, USA.

Agriculture - Farmer / produce buyer checking his broccoli crop as the harvesters are working behind him / Monterey Country, California, USA.

Aerial view of farm land in the Matanuska-Susitna Valley near Point MacKenzie, Wasilla, Southcentral Alaska, USA

Farm tractors work in tandem raking newly cut alfalfa in the Imperial Valley in early spring, mountains and hazy blue sky in the background; Brawley, California, United States of America

A tractor applies fertilizer between rows of young cucumber plants on a farm in the Imperial Valley in early spring, farm buildings and blue sky in the background; Brawley, California, United States of America

Workers plant a fall crop of broccoli in the Salinas Valley, farm buildings and fog in the background; Gonzales, California, United States of America

Workers plant a fall crop of lettuce in the Santa Ynez Valley, tree covered hills in the background; Lompoc, California, United States of America

In the Coachella Valley, newly planted table grape vines are seen staked with plastic sleeves for plant protection, staked bell peppers and mountains in background; Coachella, California, United States of America

Crop consultant checking progress on no till cotton, approximately 10-12 leaf stage, following previous year's crop of corn; England, Arkansas, United States of America

Agriculture - Aerial view of cultivated farmland of various crops / Imperial Valley, California, USA.