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微信扫一扫It is estimated by IPCC methodology and the data from FAOSTAT that the total excreta from animal production and rural human beings in Asia was 60.0 Tg N/yr，of which 18.6 Tg N/yr was used to fertilize crops in 1999/2001. The use ratio was only 31%，which is much lower than that for the EU-15，where the
