Nitrogen fixation in alfalfa
Subtitle: responses to bidirectional selection for associated characteristics
Contributors: United States. Agricultural Research Service
Series: Technical bulletin -- no. 1643
Publisher: U.S. Dept. of Agriculture, Agricultural Research Service
Published: 1982
Place of publication: Washington, D.C
Language: eng
Number of pages: 18
Subjects: Nitrogen -- Fixation; Alfalfa
Notes: "Issued December 1981"--2d prelim. page

Bibliography: p. 17-18