irrigation circle

A series of irrigation circles viewed out a jetliner window might convert the uninitiated to a belief in crop signs. An irrigation circle is, actually, a burgeoning crop of alfalfa or corn or wheat or soybeans, its shape dictated by a huge irrigation system that rotates in a circle from the pivot point of a central tower. The driving mechanism resides in the axles of twin rubber-tired wheels on struts that support the irrigation booms, which are fitted at intervals with waterers similar to those used on lawns, some of the twirlybird type, though much larger. The benefit of circle irrigation is that no ditches need to be dug and no ground pipes laid or moved once the system is in place; besides, little crop is damaged or local habitat disrupted, the only marks on the land being the trails where the paired tires trace their unending circles.

Larry Woiwode