Sean Longstaff volleyed home on 97 minutes to earn Leeds the point from Dean Court.
Farke said afterwards: "I think for us, it's a very priceless point, not just for the table, the point, but also the manner. Being good in possession today was a point of mentality, of fight, of belief, of dealing in setbacks, of togetherness, of spirit.
"It feels today also like a win, and this type of winning points is sometimes more important than the easy 2-0, 3-0 or 4-0, so this is important for the group, important for the mentality, for the spirit.
"And also to know we can't just win points when we are at our very best, dominating like we've done in the last games. So sometimes, even with will and belief and in a scruffy game for us, we can also fight our way to a point. That's what we've done.
"It's a perfect morale booster, not just for the cup game but also for the whole run-in, and definitely good for us."