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The Effect of Different Fertility Levels on Yield, Persistence, and Chemical Composition of Alfalfa¹

Synopsis: Potash was the most important factor in maintaining high yields and persistence of an alfalfa stand. The "critical percentage" for potassium content varied from season to season and probably lies somewhere between 1.42 and 1.84%. Nitrogen fertilization tended to decrease yields and stands whereas phosphorus had no significant beneficial effect.

² Assistant extension specialist and research specialist in Farm Crops. respectively.

Received for publication March 11, 1957.

This article has been cited by other articles:

				W. K. Berg, S. M. Cunningham, S. M. Brouder, B. C. Joern, K. D. Johnson, J. B. Santini, and J. J. Volenec The Long-Term Impact of Phosphorus and Potassium Fertilization on Alfalfa Yield and Yield Components Crop Sci., September 1, 2007; 47(5): 2198 - 2209. [Abstract] [Full Text] [PDF]