TY - BOOK AU - Mosier Arvin R TI - Environmental challenges associated with needed increases in global nitrogen fixation PY - 2002/// PB - Nutrient Cycling in Agroecosystems KW - Air pollution KW - Ammonia KW - Biological N fixation KW - Crop production KW - Fuel combustion KW - N-fertilizer KW - Nitrate KW - Nitrous oxide KW - NOx ER -