Agrarian riddles from Ukraine

At first glance I have found no acceptable explanation for why to change direction of tillage on a 4 hectares inclusion parcell within a large block of agricultural unit.



Probably some anti-erosion experiment as being situated on a bank-slope of an ancient waterflow. - Check GE tilted view by elevation exaggeration level 2-3:



Preventing erosion on agricultural lands with surface gradient above 12%, tillage direction is recommended to be perpendicular to the slope direction.
(As per applicable agricultural regulations in Hungary.)

agrarian riddle - Ukraine.kmz (1.14 KB)

Any other explanation anyone?

That makes sense, I guess, but I can imagine farmers being really annoyed by the extra work of this rule. I have no idea if there is a similar one in the USA.

another one with strange soil color pattern as seen on GMaps imagery - (better views in GE historical imagery!)

I think it is about water runoff blocking, therefore result of another anti-erosion method (?)