  We experimentally test quantum contextuality of a single qutrit using NMR.
The contextuality inequalities based on nine observables developed by Kurzynski
et. al. are first reformulated in terms of traceless observables which can be
measured in an NMR experiment. These inequalities reveal the contextuality of
almost all single-qutrit states. We demonstrate the violation of the inequality
on four different initial states of a spin-1 deuterium nucleus oriented in a
liquid crystal matrix, and follow the violation as the states evolve in time.
We also describe and experimentally perform a single-shot test of contextuality
for a subclass of qutrit states whose density matrix is diagonal in the energy
basis.
