[munk-a]

If agricultural workers are people working under the guidance of other folks then managers may also include the "self-managed" i.e. any independent farmers including those that rely heavily on automation. There's also probably a fair chance that subcontracting can mess this up with multiple farm hands hired onto a farm all counting as agricultural managers.

It feels like agricultural worker is actually quite narrowly defined to only be unskilled people specifically requiring oversight and management.