It looks nice. I would add more shadows/details to the grass and make the sky more smooth though :)

More detailing on the grass would be nice, and also perhaps some tones in the grass that are more earthy to kind of give it more realism? The streaky, darker parts in the sky could be softened a bit, maybe. :-)

Ok first of it looks good since your 'starting off' with new Backround. A couple of things I would suggest is the length or the prices if grass. Add some Shading and different shades of green for grass to add realism. For the sky I would add lighting affects such as light from the sun, a bit of different shades of blue/white aswell as some clouds. Overall however it looks pretty good.