The general trend shown by the N budget was a higher N loss in
the PS45 plots than the N300 plots (Table 5). However, these data
could be misinterpreted because, as previously reported [47],
NH4
þ
eN can be fixed in the interlayers of the clay minerals. Daudén
and Quílez [2] found that the immobilization and/or fixation of N
when using PS fertilizers could play and important role in the N
budget under similar climatic conditions.