Can anyone tell me what I could see from the value of N, P, K and Zn, pH to infer the change of available nutrients to plants or uptake of nutrients, etc? Please see the attachment.
Which Trichoderma ad what form you applied? Is it Trichoderma viride or T harzianum? You could try spray of T viride. Observe if T. viride grows on the infected wood.
Some isolates of Trichoderma harzianum promote root growth at 0.6% and it is likely that the plant with extra length and number of roots absorb more nutrients.
I use Trichoderma harzianum and T. gamsii to apply on the tree by cultivating on cooked rice and rice bran, giving a fully sporulating, green inoculum. I mix it with compost (pest moss) and apply in the root.