  In this paper, the general solution of second-order nonlinear differential
equations of Lienard type is obtained within the nonlinear factorization method
of Rosu and Cornejo-Perez by the so-called field method approach. This method
is based on writing the factorization conditions in the dynamical systems form
and requires to assume that the intermediate function Phi that occurs in the
factorization be dependent not only on the dependent variable of the nonlinear
equation, but also on the independent variable. The method is applied to
several cases of Lienard type equations which are written in a commutative
factorization form and their general solutions are obtained by solving
Bernoulli differential equations.
