newbie question on citrus trees

hi
sorry for not using the right terminology
we bought a house in Tampa, there r 2 citrus tree(mandarine-orange), one is almost 8 feet, the other is only 4, both have very few fruits, they look for sure they need some pruning, any web site can show me how to do it?
i noticed that that they both have the same structure, 2 main branches start from teh bottom, one carry the fruits(the weaker), the other main branch have only leaves but they are (needles) on the whole side branches , again it has absolutely no fruits at all
thnx for help
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Citrus don't need much pruning. But just for the heck of it, Google "citrus pruning" and you'll get all you need to know. Gary

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