I'm also unable to figure out what that is, did you figure it out?
Okay I played some more and for anyone reading this in the future who is having a hard time: The only resources the game asks you to get are dirt/mud, stone, and three types of wood, never seeds. The sprites for the wood as displayed on the quota list are different from the way the wood looks when collected and stored. One of the quota wood sprites especially looks like a seed but it's not, it's just the wood. A few times I couldn't get the quota tracker to accept my resources and thought they were wrong but it was actually because dropping resources places them sort of randomly and if you are standing on the edge of the quota zone, you might accidentally drop them outside. Just pick them up and place them more carefully.