  We consider electron transport in a nearly half-metallic ferromagnet, in
which the minority spin electrons close to the band edge at the Fermi energy
are Anderson-localized due to disorder. For the case of spin-flip scattering of
the conduction electrons due to the absorption and emission of magnons, the
Boltzmann equation is exactly soluble to the linear order. From this solution
we calculate the temperature dependence of the resistivity due to single magnon
processes at sufficiently low temperature, namely $k_BT\ll D/L^2$, where $L$ is
the Anderson localization length and $D$ is the magnon stiffness. And depending
on the details of the minority spin density of states at the Fermi level, we
find a $T^{1.5}$ or $T^{2}$ scaling behavior for resistivity. Relevance to the
doped perovskite manganite systems is discussed.
