As a turf manager on a golf course, it's hard to find a positive thing to say about trees. I mean all they really do is fight against us on our quest for perfect turf. They shade our turf. They block wind flow around our turf. Their roots take water from our turf. On top of all that we spend countless hours picking up after them. Lately I'm sure you've noticed an excessive amount of irritating little kernel things all over the greens. Below is a picture of what I'm talking about and these things are the male cones (strobili) of a Douglas fir.