I've been planting acorns for 2 weeks now. Put in about 130 gallons so far. Most have been disced in while other places were hand planted. Hand planted 5 gallons tonight in fact. That is a huge bur oak acorn in your pic. I have seen tremendous bur and white acorn production around here. I need to quit gathering and planting to focus on other things but it is hard to ignore all the mast laying around this year!