Are these citrus roots?
My in ground Kishu mandarin looks really bad. I dug a little bit around the mulch and found a lot of roots like that in the picture. I am not sure if they are the citrus roots. There are no big plants around it. These roots grow quite well but the top of the tree looks really bad.
There are also a lot this kind of roots around my small Avocado tree, but the avocado grows quite well above ground.