This year’s harvest for German farmers has been a disappointment, with significantly lower prices for many crops and poor yields due to wet weather, the German Farmers’ Association said on Thursday. “Farmers are let down. The yields are below those of previous years,” Joachim Rukwied, the leader of the agricultural industry group, told public broadcaster ZDF. “The frustration in agriculture after this harvest, which was interrupted by recurring rainfall, is strong.” There has been a 10-year decline in grain and rapeseed yields, said Rukwied, with declining quality, too. Rukwied said the downtu…