307130 Nr nitrogen 169 304628 NO nitrogen 22 310298 Nt nitrogen 21 3137346 Norg nitrogen 6 304266 NN nitrogen 4 301424 Ni nitrogen 4 300562 NG nitrogen 3 1338369 NRE nitrogen 2 1346721 Ntr nitrogen 2 299210 N-e nitrogen 1 1318405 NGO nitrogen 1 1322596 NIR nitrogen 1 1331859 NOR nitrogen 1 3115838 Nenr nitrogen 1