there are a number or things that could be happening. it could be that you were not on a tripod = camera shake (1/80th is slow) or it could be that your lens is of poor quality (you dont say what lens you were using), it could be that the wind moved the trees. . . .

Go shoot it again at iso 200 and from a tripod at f11 or f16, set your white balance to sunny or about 5000k and repost. . .

At f16 you will have good depth of field so focus on the trees or better, focus about 1/3 of the way into the frame and you should be able to gather yourself a stellar image. . .