| Table of Contents |
| 1. Introduction 2. Sensors 3. Microwaves 4. Image Analysis 5. Applications |
Fundamentals of Remote Sensing
5.2 Whiz Quiz Answer
The "crop circles" are in fact, healthy crops irrigated using a pivot irrigation system - not the result of alien tricks. In the dry southern prairies, farmers rely on pivot irrigation systems to keep the crops watered and healthy. You can see that in the corners of the fields where the water fails to reach, the vegetation is missing or has suffered. The brownish grey areas in this image are primarily rangeland, while the crops appear green. Crops can be successfully grown if a regular irrigation routine is followed, but this puts a heavy demand on water resources in a typically dry area.
| Updated2002-08-21 |  |
Important Notices |