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During an experience performed to elaborate an efficient technology of seed production in birdsfoot trefoil, we observed a series of correlations between yield and the elements of productivity, which exert a strong influence on seed quantity. In this viewpoint, the matrix of correlations between the elements of fructification, in the case of the influence exerted by birdsfoot trefoil cultivation method, made evident the following correlation coefficients: r = 0.81**, between the number of pods/plant; r = 0.82**, between the number of generative sprigs and the number of pods/inflorescence; r = 0.98**, between the number of generative sprigs and the number of pods/plant.