Nonleptonic hyperon and f2 -decays are analyzed in the framework of the Weinberg-Salam model of weak interactions. Various effective weak nonlepton~c Hamiltonians are tested with and without quantumchromodynamic corrections, including extensive variations of all the parameters in question. The influence of quark models is also investigated using both the MIT bag model and the harmonic-oscillator model. Various dynamical assumptions connected with particular selections of current-commutator and pole terms are also considered. Irrespective of all variations and uncertainties, it seems that orders of magnitude and relative signs for various amplitudes are always correctly reproduced.