What are you talking about dude? How are they compost piles? Sure the plants are damaged due to extreme heat building up in from whatever created these crop circles, elongating the nodes within the crop, even bursting them. But that's just the cost of the great message behind them. Scientists have found that the plant's DNA structure had been altered differently when compared to others outside of the circles. They also found the soil had been baked of sorts, & found magnetic sediments within the soil, which were unnatural when compared to the soil outside the circle.

You say man-made, I say extraordinarily made. I wouldn't say Aliens & UFOs made these, but I wouldn't rule it out. Also, the other comments about energy cones & pyramids is quite intriguing, will look more into that. I'm a firm believer when it comes to energies.