The law of diminishing returns
Subtitle: part one: The law of the diminishing increment
By: by W. J. Spillman; part two: The law of the soil, by Emil Lang.
Contributors: Lang, Emil, 1883-
Series: New-world agriculture series; New World agriculture series
Publisher: World Book Company
Published: 1924
Place of publication: Yonkers-on-Hudson, N.Y; Chicago
Language: eng; ger
Number of pages: 178
Subjects: Agriculture -- Economic aspects.
Notes: "Part II is a translation, by the author, of part I ... of an article by Dr. Emil Lang in the Landwirthschaftliche jahrbu cher, vol. LV, 1920, entitled 'Der ertragsverlauf in der landwirthschaft bei steigendem aufwand'."--Pref.