The back and forth between the U-S and China over agricultural goods is enough to make anyone’s head spin. But for those in the farming industry – it’s yet another bump in an already rocky road. Floods and disease have plagued crops this year. That’s on top of overall farm incomes that have fallen 45-percent over the past six years. Also feeling the pain: companies who support those farmers. Companies like Caterpillar – the 94-year-old construction equipment maker.