Isn't a bunch of farm work just repetitive tasks? Animals have to be fed, watered and mucked out, gardens have to be plowed, planted, weeded, etc. To be realistic, maybe the first three or four times your daughter is doing some of these things its "learning". The rest of the time its just chores.
Honestly -- unless your daughter wants to live your same lifestyle, many of these skills are not of much value. Of course, I'm over 30 and have never changed my own oil and feel not a whisker of guilt/angst/personal failure about it. The day I do, I'll google "how to change oil", and follow the instructions.
For the OP, I live in a farming area, and I think even the farmers would be uncomfortable with your first post here-- If I were you, I wouldn't bring up your need for more help around the homestead as a motivation for homeschooling (after all, most farmers send their kids to school and figure out how to run the farm without them). I'm still not sure how you intend to find time to homeschool your dd on top of everything else, but talking about needing her to do more chores gives the wrong impression, IMO.