I'm finding the ability to hire workers very hit and miss - sometimes I get the option whereas other times I can't get it to come up at all. Is there a set of rules that govern hiring of workers? At first I thought that I just wasn't able to get them to work because I was in the middle of a task driven by the My First Farm storyline, like if I had to cultivate or plant potatoes I couldn't set a worker to do a task on another field. But I'm currently at the point of switching to Italy (visit logistics centre) and I was able to set a worker fertilising field 3 but I cannot get another worker to plow field 1. I have the starting Zetor tractor and the plow at the field but no matter where I place it there is no hire worker option. The field has 40% fertilisation and is x% irrigated but other than that all status bars are at 0 after I harvested what was grown previously.