JACK K. CLARK / AGSTOCKUSA / SCIENCE PHOTO LIBRARY JACK K. CLARK / AGSTOCKUSA / SCIENCE PHOTO LIBRARY
Crop spraying. Tractor spraying herbicide onto a field of early growth wheat (Triticum sp.). Herbicides are necessary in modern agriculture, since weeds, once established, can spread rapidly. These weeds will compete with the crop plants for light and soil nutrients and so can affect the size of the harvest. Photographed in California, USA.
Model release not required. Property release not required.