yellowing fruit leaves

Question

Have a tangelo tree about 1 year old. The leaves are turning yellowish.

Answer 1

This could be a nutrient deficiency, a stress response, or potentially a disease or insect. These articles will help you:

http://edis.ifas.ufl.edu/ch142
https://www.gardeningknowhow.com/edible/fruits/oranges/yellowing-orange-tree-leaves.htm