If you have 3,000ha it is ...
Published by Robert French, Jacobs - Contract Manager
If you have 3,000ha it is most economic to use rain guns
If you have 3,000ha it is most economic to use rain guns. Design a permanent ring main system with quick access couplings for the rain guns (reel driven) in rectangular plots.
Some useful background here http://servalsgroup.blogspot.it/2008/10/advantages-of-using-raingun.html