Very few commercials run singles darn few that I know of.
To Petes point on "trials" no offonse but that silly. this is a very good case of where trials are worthless. too many varibles, to many locations to many inputs. and too hard to quantify output. A "trail" run in one location by a researcher would have no value in a different location, with different goals and managment.
Nope, this is one where individual expirements and information is the key, and then a fit to your operation.
Charles
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