citation

English

pollination [cite]

By John Severns = Severnjc (Photo by John Severns.) [Public domain], via Wikimedia Commons

crop duster [cite]

By Stefan Krause, Germany (Own work) [FAL], via Wikimedia Commons

monoculture [cite]

CC By 2.0 Photo by Andy / Andrew Fogg

apatite [cite]

Top: By OG59 (Own work) [Public domain], via Wikimedia Commons
Bottom: Mila Radulovic [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons

dust storm [cite]

NOAA George E. Marsh Album [Public domain], via Wikimedia Commons

rill erosion [cite]

Left: By Dr Donal Mullan (Given to me by the photographer) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
Right: USDA Natural Resources Conservation Service

Combine [cite]

By David Nance, USDA ARS [Public domain], via Wikimedia Commons

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