Agriculture - Slightly rolling early growth grain corn field in early morning summer light with a farmstead in the distance / Central Iowa, USA.

Agriculture - Slightly rolling early growth grain corn field in early morning summer light with a farmstead in the distance / Central Iowa, USA.

Agriculture - A farmer looks out across his early growth grain corn field several weeks after planting, inspecting the young crop, with grain bins in the background / Central Iowa, USA.

Agriculture - Contour strips of mid growth tasseled Summer grain corn and windrowed alfalfa in early morning light / Northeast Iowa, USA.

Agriculture - A field of mid growth tasseled Summer grain corn in late afternoon light / Northeast Iowa, USA.

Agriculture - Post-emergent herbicide being applied to an early growth grain corn field by a John Deere sprayer in late afternoon light / Iowa, USA.

Agriculture - Post-emergent herbicide being applied to an early growth grain corn field by a John Deere sprayer in late afternoon light / Iowa, USA.

Agriculture - Post-emergent herbicide being applied to an early growth grain corn field by a John Deere sprayer in late afternoon light / Iowa, USA.

Agriculture - A farmer and his son pose in their mid growth corn field in late afternoon light / Iowa, USA.

Agriculture - Rolling hills of fully tasseled grain corn in early morning light / Northeast Iowa, USA.

A farmer inspects his mid-season soybean field in early summer; Iowa, United States of America

Agriculture - Early growth soybean field showing corn debris from the previous year

Agriculture - A RoGator spraying an early growth grain corn field / near Truman, Minnesota, USA.

Agriculture - A RoGator spraying an early growth grain corn field / near Truman, Minnesota, USA.

Agriculture - Chemical application, side-dressing early growth corn, nitrogen injection and cultivation, equipment close-up / Illinois, USA.

Rows of early growth grain corn plants backlit by the sunrise, near Truman; Minnesota, United States of America

Agriculture - Farmer husband and wife pose together in a partially harvested grain corn field in Autumn / near Sioux City, Iowa, USA.

Farmer husband and wife pose together in a partially harvested grain corn field in Autumn, near Sioux City; Iowa, United States of America

Rows of early growth grain corn plants backlit by the sunrise with a farmstead in the background, near Truman; Minnesota, United States of America

Agriculture - Cross section of ear of mature grain corn showing kernel depth and milk line / Wisconsin, USA.

Agriculture - A farmer poses in his early growth grain corn field in early summer / Southwest Iowa, USA.