I'm going to shoot from memory on this. The bacterium is available commercially and is called Actinovate. If you have a chemical laced soil, you should wait a year and work on getting soil microbes growing. The Actinovate only works in organic soils. The bacterium in Actinovate will destroy the microbe that causes cottony root rot and may be effective in controlling root knot nematodes. Cottony root rot is the major cause of Texas fruit and nut groves not living and producing to their full potential. Malcolm treated three apple trees in an apple orchard in Medina, Texas. The entire orchard was wiped out by CRR after just a few years of production. Malcolm visited the site of the orchard after they closed down and found that the three trees he treated were producing just fine in a sea of dead trees. He has the pictures. As I recall the roots of the trees need to be treated when planting. If you want an organic orchard in Texas, you will regret it later if you do not talk to Malcolm one way or another. Find out what it would cost you to get him to visit you. Whatever it takes
Another orchard grower tried using mulch to keep as much moisture on the property as possible. He found that he never needed to water because of the mulch. Think about the difference in your profit margin when you have an irrigation system versus not needing one. Irrigation systems first of all cost money, they need spare parts, they need to be housed in a building when not in use, the require your labor to hustle them around, plus you have to pay for the water. Ask Malcolm how much mulch that grower used. I know but I'm not telling. Ask Malcolm. He's got pictures.