hard dry satsumas

[saute86]

One of my trees has 2 branches that has large dry satsumas every year. The rest of the tree has smaller sweet satsumas. Its the weirdest thing. I never fertilize or water my trees but I do keep mulch under the trees out to the canopy edge. Every year they are so full of satsumas the branches bend till they touch the ground. Now my lemons are small this year and about half the lemons as last year. Last year they were as big as grapefruits too and had about a 100 on the tree. My trees are 20 years old and didn't begin to produce good until they were about 10 to 12 years old.