I have sand loam in most of my property although there is an area that gets into clay after about 1'. I suspect the watering from the avocados is soaking further into the field underground than I previously thought. In the pictures some of these soils samples are 20' away from being hit even by an occasional drop from the avocado irrigation, some are 10' away from the perimeter of the avocado sprinklers reach. The soil samples in the pictures were taken today and the last watering was about 15 days ago. Mostly dry the first few inches and then progressively damp-moist, able to form a clump at 12" in all samples taken.
I have the following varieties of mangoes with various rootstock (manilla, turpentine, and Coriente). The 2 unknown varieties are estimated to be about 12 years old and 6 years old, the rest were planted by me in the last 2.5 years as about 3 year old trees. The picture of the mango tree in this post is the smallest (so arguably should be the most stressed from lack of water):
Kesar
Chok Anan
Keitt
Valencia pride
Lemon zest
peach cobbler
sugar loaf
fruit punch
Sweet tart
Angie
orange sherbert
M-4
Cac
Kathy
NDM
Diamond (Sein Ta Lone)
Haden
Pickering
florigon
Glenn
2 unknown




