RE: Which Fertilizer?
Rob, Regarding your clover question it's best to get that answer from a soil sample. It will only cost about 10 bucks and will ba back with in 2 weeks about the same amount of time it will take to kill your weeds. Generally, 10-10-10 is ok if you are planting clover that is mixed with other plants suck as chickory if you need to generalize. However, anyone will reccoment a soil sample.
As far as your fruit trees are concerned if they are baring fruit you can go with a low nitrogen mix like a 0-10-15. However, if they are old and need some pruning and have less than adequate fruit production I would use something in the 10-10-10 range or 15-15-15.
I don't know the answer to your pine question, sorry.
TGK