= Internship of Louis-Axel Edouard-Rambaut = This internship has been conducted during my Master 1 of Ecology. This work comports N parts, the first correspond to the work done for the intership report on the comparaison of the N2O emissions ine ORCHIDEE with the same emission in the EDGAR inventories. The second part correspond to the additional work i did with the same compariason of emission this time done on the NH3 emissions. = I - EDGAR and ORCHIDEE = II - Comparaison of N2O emissions = III - Comparaison of NH3 emissions =