About Us | Help Videos | Contact Us | Subscriptions



This article in AJ

  1. Vol. 63 No. 5, p. 667-669
    Received: June 9, 1970

Request Permissions


Effects of Shading and Nitrogen on Growth of Grass-Alfalfa Pastures1

  1. Wing-To Chan and
  2. A. F. MacKenzie2



The relative competitiveness of alfalfa under varying nitrogen and shade conditions must be known to manage grass-legume mixtures for maximum yield and quality of hay. Therefore, the growth of a grass-legume mixture (predominantly Phleum-pratense L. and Medicago sativa L.) under artificial shading and with added nitrogen was studied under field conditions in Quebec in 1967 and 1968. At low N levels, the alfalfa was a stronger competitor in the mixture under full sunlight, irrespective of the stage of growth. At high N levels, alfalfa yields were decreased due to increased grass growth. However, shading had very little effect on the competitive ability of the alfalfa at high N levels. Grass with upright leaves should permit more effective competition by alfalfa.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © .