01116nam a2200205Ia 4500 CTU_22166 210402s9999 xx 000 0 und d 631 L253w/N6 FAO FAO land and water bulletin N6 Long-term scenarios of livestock-crop-land use interactions in developing countries FAO Rome FAO 1997 This report presents long term scenarios describing interactions between livestock, crop production and land use and the possible consequences for the nutrients required for crop production and anumal waste. The livestock-crop interactions also play an important role in the emission of atmospheric pollutants. As an example, scenarios of the emission of ammonia ( NH3 ) and nitrous oxide ( N2O ) from animal excreta and synthetic fertilizers are present, as well as projections of the emission of methane ( CH4 ) by ruminating animals. natural resources Nguyễn Quang Điền, 980324 Trung tâm Học liệu Trường Đại học Cần Thơ