translate English to French: Much is in the liquid portion of manure, and significant losses occur if this liquid is allowed to run off feedlots and from manure storage facilities. In addition, a large proportion of manure N is in the form of ammonium (NH4+) and, upon exposure to air, can be converted to ammonia gas (NH3) and lost to the atmosphere.
Autres apports d’azote La fixation de l’azote atmosphérique par les légumineuses cultivées contribue à accroître la charge d’azote dans les sols.