I think you just bought 0baba variety trees that will never have nuts!
Really, I don’t know. Calcium, potassium, iron, zinc, copper and manganese are important in the right traces and ph level is important for plant health. Nitrogen is important for growth rate. You can send soil samples to your agriculture extension office with an explanation of what you want to grow and they can tell you what to do. I have not done that and it is why I am stumbling around figuring it out on my own.
I just received a zink additive for pecans from Starks.
We have pecans in the wild part of our Ozarks property.
They have similar leaves...