Can I add a field that is away from my main farm?

Yes, so a leased field down the road lives in the same plan as your home farm. Draw each piece of land as its own farm area with Add to map > Farm area, even kilometres apart.

Blocks, beds and plantings work the same on all of them, and your Crop Map shows every block, whatever area it sits in. To choose where the map opens for you, select an area and check Use the farm area as the focus location: each person on your team picks their own.

See Draw your farm areas.