two-plane internally irrigated root observation system for forest nursery stock
By: Paul S. Johnson, Charles W. Putnam, and William G. Mares.
Contributors: Putnam, Charles W. 1949-; Mares, William G.; North Central Forest Experiment Station (Saint Paul, Minn.)
Series: Research paper NC -- 197.
Publisher: North Central Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture
Published: 1981
Place of publication: [Saint Paul, Minn.]
Language: eng
Subjects: Roots (Botany); Forest nurseries; Trees -- Seedlings
Notes: Cover title.

Bibliography: p. 5-6.