The annual grain output of China is about 500 million tons, and the loss in the processes of threshing, drying, storage, transportation, processing, and consumption after harvest is as high as 18%, which is a big gap with the world's annual mildew loss of 3%. Among these losses, because of climatic reasons, the grain that couldn't reach the time limit of grain drying or failing to reach the safe moisture causing moldy, germinate and other losses was as high as 21 million tons, accounting for 4.2% of the country's total grain output, and a direct loss of 18 to 24 billion RMB. yuan.
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