On the impact of inventory uncertainties on non-CO2 greenhouse gas emissions reduction options

Current estimates for greenhouse gas emissions of agricultural sources are rough. Major sources for methane are enteric fermentation and manure, and for nitrous oxide manuring and fertilization. These sources are highly sensitive to the fanner's individual and local management practices and to physical conditions like pH or temperature leading to large variations between farms. Emissions trading can increase the fanner's income. In particular the income differences resulting from the large emission variations between farms can become a major drive to find the most cost-effective reduction options and may lead to more accurate inventories. Inexpensive and simple monitoring facilities are needed soon to help farmers profiting from the emissions market.