The nitrogen and humus problem in dry farming
By: by R.W. Thatcher.
Series: Bulletin / State College of Washington. Agricultural Experiment Station -- no. 105.; Bulletin (State College of Washington. Agricultural Experiment Station) -- no. 105.
Publisher: State College of Washington, Agricultural Experiment Station
Published: 1912
Place of publication: Pullman, Wash
Language: eng
Number of pages: 16
Subjects: Dry farming; Soils -- Nitrogen content; Humus
Notes: Cover title.