Fit of NH band in our sample of stars known or suspected to be N-rich. The small black crosses are the observed spectrum. The red line represents the best fit of the observed spectrum, and the blue lines show synthetic spectra computed with two different values of A(N) indicated on the figure. For HD 25329, the cooler dwarf of our sample, the region between 3358 and 3362 Å is saturated, and thus we fitted the observed spectra between 3366 and 3369 Å. The values of [Fe/H] and [N/H] are indicated for each star in the figure.