What the circle packing does accomplish though is to collect more of the uncovered space into semi-rectangular areas at the edge of the plot, which could be used for other purposes, like buildings or specialty crops. The plumbing is more complex though. One circle is one pipe, 1/2 of the width (sqrt(2)/2 diagonal) Four circles is at least two pipes, 2 width or more and, you might have to run the irrigation sequentially due to flow rate. That could mean time in the field.

I was watching a Joel Salatin video recently and he was pressing the point of having irrigation and other systems where you don’t have to cross the property, on foot or with equipment, to do chores. It’s a huge time sink and some days you will run out of time. If you have to stay for the duration it’s even worse.