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The article presents results of some test sketches - validation and ordering - of the mathematical models proposed for the physical law rank on soil tillage draft force. The results constitute the continuation and partial completion of a method of testing - validation and ordering - the models proposed and published by researchers in the specialized literature of the last seventy years. The material defines and completes the method (initially only a validation method), up to a method of ordering the models according to their accuracy in relation to the experimental results. The proposed tests are intended to increase the coherence of research in the field of searching for a physical law of soil tillage draft force, assuming that it exists. The method can also be applied in case of other physical laws in research, construction or improvement stage.

RELATIVE ORDERING TESTS FOR DRAFT FORCE MODELS IN SOIL TILLAGE