Documentation Reason for Recalculation: In case of enteric fermentation, specified data on cattle distribution by breeds was used. Nitrogen excretion rate depends on amount of managed manure N available for soil application, i.e. on cattle breed. Table 2.15.4: Category-Specific Documentation of Recalculations (Manure management) Documentation Reason for Recalculation: The specified data on cattle distribution by breeds has been provided by the highly experienced person Mr. Levan Tortladze - Head of the Department of Zootechny of the Agrarian University of Georgia. Emission factor for enteric fermentation significantly depends on cattle breed.