can you vary the pressure of sprinklers? like max pressure on corners that a perfect square irrigation can be obtained.
The machines often have a radius of 400m, so they're a lot bigger than the range even a firehose could achieve.
Generally the middle of the structure has small sprayers evenly spaced, and the end of the structure has what looks like a regular sprinkler on steroids. The large throw increases the effective diameter.
It’s a fair question, but the net would be that you use a slightly longer structure and get a rounded rectangle, where the rounded rectangle is just a truncated circle of the area the same sprinkler could cover in theory. Weigh that against the yield and extra maintenance costs.
I haven’t seen this many times, but the Wikipedia article points out there are linear systems that irrigate rectangular areas. They use a canal on one end and pumps on the rig. That explains an unanswered question about irrigation practices I’ve seen in Eastern Washington.
They frequently do have a sprayer at the end, but it's not sufficient to cover more than an extra few rows around the corners.