looks pretty normal to me Troy. Just dropping liquid fertilizer on the ground works as a short time fix. The tree might boost, but it kills the soil biome. In there live bacteria which the plant feeds sugars it fixes in the leaves. The bacteria bloom, and get eaten by protozoa and the likes which excrete nitrogen the tree then sucks up. Pretty amazing system. If you want to help your trees long term look into pruning, look into feeding them organic
compost and look into covering the surrounding earth with wood chips. Wood chips prevent evaporation and feed the soil life. It looks pretty poorly on that field.