Interesting compostion I like the way you have gotten in close to the ground in the shots...
the first one sort of works for me...but i feel that if the horizon wasn't so close to the middle of the shot it would work better...I know...rules are made to be broken and I personally break them all the time but in this instance I'd give cropping it a go and see if the image improves...
The other two pics are also good...nice leading lines with the grass rows..once again though I'd perhaps crop them in so thatonly the grass lines and not the other paddocks are visible..oh and I know its tall order but as my eye's are being led into the pic by the rows of mown grass it would have been wonderful if there was something of interest at the far end of the shot...a tractor...mower..child...tree...maybe..
