Energy levels and the radiative and Auger transition rates of the 1$s$2${p}^{4}$ ${}^{2,4}L$ ($L=S$, $P$, $D$) resonances in the boron isoelectronic sequence are calculated using the saddle-point variation and saddle-point complex-rotation methods. Large-scale wave functions are used to saturate the functional space. Relativistic and mass polarization corrections are included by the first-order perturbation theory. The Auger branching ratios of the important decay channels for these core-excited states are calculated. The reliable transition wavelengths and Auger electron energies are used to identify available x-ray spectra and Auger electron spectra. Identifications of several unknown experimental lines from 1$s$2${p}^{4}$ resonances are reported. The total radiative rates and total Auger rates of these 1$s$2${p}^{4}$ resonances are also reported and discussed along with the increase of atomic number $Z$. It is found that the total Auger rates are several orders of magnitude greater than the total radiative rates in these low-$Z$ ions.