The effects of various combinations of nitrogen, phosphorus, and potassium on paper birch seedling growth
By: John C. Bjorkbom
Contributors: Northeastern Forest Experiment Station (Radnor, Pa.); United States. Forest Service
Series: USDA Forest Service research note NE -- 158; USDA Forest Service research note NE -- 158.
Publisher: Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station
Published: 1973
Place of publication: Upper Darby, PA
Language: eng
Subjects: Paper birch; Nutrition; Trees; Seedlings
Notes: Caption title.

Includes bibliographical references (p. 4).