Need help identifying these

i was playing with google earth(a nifty satellite photograph program at earth.google.com) and found this to be kind of interesting...im assuming they're some sort of cropping technique but they span such a vast area that i can't help but believe they aren't

here is where i found them on the map


a slightly closer picture


even closer


slightly to the west...more sparse


more north(the two similar ones on the left are unique to the rest...and there appear to be older ones to the far right


northwest of the main area, near a residential area


they range in save from anywhere to about 1/3 of a mile to .6 miles

just curious as to what they are...they caught my eye


[edit on 1-9-2005 by Sacreligion]

hehe you put a water sparkler in the center and and goes round and round ..making a circle used all over the world i didnt know this until...today i learned from a different post cause their in nevada when peeps were using goggle earth to look at area 51

i...think that had something to do with it

good avaie btw ghostbusters own !

They are farms, serviced by a centrally located water system that has an armature the extends radially from the center to the outer edge. Extremely efficient and productive, it is how farming is performed in many arid climates. Here is a link with photographs

now that's an Über irrigation system

thank you for curing my curiosity

Hmmmm...to me, they looked like fast food soft drinks with the straws....

Now I'm getting thirsty!