Shots look great. The only thing you should keep in mind is composition, it takes practice and I still catch myself not watching out for it as well. What I'm meaning is things like the "rule of thirds." Some of the shots have way to much sky, grass, or both. Unless the sky or the ground have something very interesting in them or in some way are helping to tell the story they are just taking up space. Its typically best not to center subjects also.
Though when shooting horizontally putting that old pickup truck in the far left 1/5th of the frame and letting a lot of that beautiful scenery show across the remaining 4/5ths would be completely exceptable. This is an exception to that rule of thirds that works.
Of course photography also falls into the realm of "art" so one guys art is another guys trash so don't take any criticism to seriously.