In geometry we had to do a research paper with the topic "Geometry and..." Ex: geometry and diamond cutting, geometry and Picasso, Geometry and airplanes. Being a kook, and knowing geometry and the kama sutra wouldn't fly, I did geometry and crop circles. It was actually really fun and I got totally into it. We had to do a presentation and I decided to make a crop circle to show of in the presentation. Keep in mind when reading this that all crop circles are made by flattening the grass or wheat, not cutting it. My first idea was to plant a cookie sheet with grass and make a fairly complex, but small, design in it. However my grass didn't grow fast enough so I decided on one ten foot diameter circle in my back yard. Here it is. I was really diaspointed that my "set of four diminishing circle by one half radius using perpendicular tangents" was too complex for this scale without a ton of planning.
You will need a stake, rope and some sort of squisher. I used a pitchfork as a stake and a board with an loopy hook at the squisher. You could use a peice of cardboard or a ski or anything as long as you can secure it to a rope.
1. Place stake at desired postion.
2. Tie a loop of rope around the stake or pitchfork. The tie the rope to the squisher, keeping in mind that the far edge of the squisher plus the rope will be the diameter.
3. Walk around holding the squisher, to just sort of walk out the circle to make sure you have enough space, aren't going to have to deal with rocks etc. Optional but recommended.
4. Place the squisher on the ground, witht he rope taunt and slide it forward so it you begin to squisher the grass in one direction.
5. Step on the squisher. You may need to jump a little to really flatten the grass.
6. Continue sliding and stepping until you have made your whoel circle.
7. If you want a ring, you are done, if you want a solid circle you have two options. A. Shorten the rope and repeat. B. Get rid of the rope altogether and sort of step side ways all around the circle, using the outer rings as a guide. This is what i did.
8. Optional, I went over mine with a garden rake to make sure it looked good in the pictures for my class, but If your are just trying to weird out you neighbors, this doesn't make enough difference to be worth it.
I squished the grass by walking in a circle
Tada. Big circle of squished grass... Impressive. Took abotu a half hour start to finish including assembleing the materials and putting the screw into the squisher.