[Studies on the yield and quality of alfalfa varieties].

The correlations found between yield and content of several varieties of alfalfa show that selection for green matter only does not result in the deterioration of fodder quality. Green matter variability has more influence on the yield of dry matter, crude protein, and phosphoric acid than does the corresponding content; only the yield of carotene depends less on the green matter yield than on the carotene content.Variability in content decreases from carotene to phosphoric acid to crude protein, which makes the increase of carotene content easiest, that of crude protein hardest to achieve.