Hi all, I could really use some help. I cannot determine if I am watering my 1-year old fruit trees or underwatering them. I live in Southeastern New Mexico. The temps tend to be pretty hot from now till November. My trees are developing yellow leaves towards the tops of the trees that then turn brown. I can't tell if the leaves are 'drooping' or not. I have to water my grass daily, for 45 minutes using sprinklers attached to my hose to get/keep the grass green. I am afraid this is watering the trees too much, but when I stick a moister prob next to the tree trunks, it shows just over the middle of the probs moister meter. I am pushing the prob down 5-6 inches in depth.
I looked up signs of over-watering and they are the same as not watering enough. I am afraid I am going to lose the trees if I can't figure this out. Does anyone have some tricks to help me determine if I am drowning my trees or if they are drying up! I can provide pictures if it would help. Also, this is happening on the pear tree and the cherry trees. So far I haven't seen it on the plum trees.