Cross sections of the nitrogen atom in \AA$^2$ for the direct ionization, excitation-autoionization, total ionization from the ground level $2s^22p^3\ ^4$S and metastable $^2$D and $^2$P terms, and the cross section for the ground (70\%)--metastable (30\% $^2$D) mixture as functions of the incident electron energy $T$ in eV.} T & From $^4$S & \multicolumn{3}{c}{From $^2$D} & \multicolumn{3} {c}{From $^2$P} & 70/30 Mix \cline{3-5} \cline{6-8} & Total & Direct & Excitation & Total & Direct & Excitation & Total & \\ 12 & 0.00335 & 0.120 & 0.123 14 & 0.0263 & 0.273 & 0.300 16 & 0.0706 & 0.411 & 0.481 18 & 0.121 & 0.540 & 0.661 20 & 0.169 & 0.653 & 0.822 25 & 0.268 & 0.870 & 1.137 30 & 0.344 & 1.026 & 1.370 35 & 0.408 & 1.151 & 1.559 40 & 0.458 & 1.243 & 1.700 45 & 0.495 & 1.309 & 1.804 50 & 0.523 & 1.356 & 1.879 60 & 0.560 & 1.411 & 1.971 70 & 0.578 & 1.432 & 2.010 80 & 0.587 & 1.432 & 2.019 90 & 0.588 & 1.421 & 2.008 100 & 0.584 & 1.401 & 1.985 120 & 0.570 & 1.351 & 1.921 150 & 0.540 & 1.266 & 1.806 180 & 0.509 & 1.183 & 1.692 200 & 0.489 & 1.132 & 1.620 250 & 0.443 & 1.018 & 1.461 300 & 0.404 & 0.925 & 1.328 350 & 0.371 & 0.846 & 1.218 400 & 0.343 & 0.781 & 1.124 450 & 0.319 & 0.725 & 1.044 500 & 0.299 & 0.677 & 0.976 600 & 0.265 & 0.599 & 0.864 700 & 0.238 & 0.538 & 0.776 800 & 0.217 & 0.489 & 0.705 900 & 0.199 & 0.448 & 0.647 1000 & 0.184 & 0.415 & 0.599 2000 & 0.107 & 0.241 & 0.348 3000 & 0.0771 & 0.173 & 0.250 4000 & 0.0606 & 0.136 & 0.197 5000 & 0.0502 & 0.113 & 0.163