I'll just echo what TwoPynts and Onslow said. The crop I did was to eliminate the brown in the background on the right of the image and the pale green plant on the left. My eye kept needlessly wandering to those areas and tried to put the focus back on the hopper, while trying to maintain the sense of scale in your shot. I think TwoPynts vertical crop is a much better choice to focus on the hopper and what it is doing.