I leased out my crop ground last year for crops this year and last. I gave the guy a low rate with the understanding he would use the difference to bring the micro-nutrients up in the soil. Last fall when I asked how harvest was it was good. This year, when I asked for the soil test from last year and this to see how the micro-nutrients had improved as well as harvest numbers; I got some numbers that I know are patently false, unless he is that piss poor at farming. Also he never came forth with the soil tests. He claimed to only get 20 bushels of beans and 50 corn to the acre. These days with crop rows tighter and modern fertilizers, he should have done far better than that. My Mennonite grandpa, farming with horses did better than that. I don't believe this man fertilized and I am pretty certain he did not replace the micro nutrients. Now here it is May 16th, and he has not even begun to work the ground for this year. I spotted his truck parked in the field, but I never spotted a tractor out theres. His wife did show up for a bit. I could have missed someone out there working but I heard nothing at all like a tractor running. With costs way up this year, he wanted to put down manure, and as long as it is properly applied I am fine with that. Next year the land is to go into hay for a few years and he wants to only put in partial acres to hay and the rest crops again at the discounted per acre rate from last year. I have news for him. I HAVE the cash to plant the entire farm to hay and it will all be going into hay as our contract calls for share cropping the hay for three years. I don't want to prolong things any longer. I have had three other farmers tell me he is taking advantage of me. I am sure he is. Land is expensive, and he wants to buy mine. What better way to drive the price way down than to paint it as unproductive.
I would have no idea what you mean by "bringing up the micro-nutrients". Nitrogen, phosphate, potassium (potash), and sulfer are the major nutrients. Micronutrients that could be deficient include manganese, zinc, boron, etc. etc. But micronutrients are not normally a problem, unless they are deficient in the soil in that area. And micronutrients are not normally an expensive problem. For the major soil nutrients "building up" does not make sense for the more water soluable ones (nitrogen compounds for example). Anyway.... all of that to say... I can't imagine how you would have a case against him. As for what he did or didn't do... a soil test is not going to prove much, but that corn crop (depending on what kind of corn it is) does not look unhealthy, but without knowing when the photo was taken and what weather had been like, etc. it does not show anything.