Productive soils
Subtitle: the fundamentals of successful soil management and profitable crop production
By: by Wilbert Walter Weir ... edited by R. W. Gregory.
Contributors: Gregory, Raymond William, 1893- ed.
Publisher: J.B. Lippincott company
Published: 1938
Place of publication: Chicago; Philadelphia [etc.]
Language: eng
Number of pages: 325
Subjects: Soils.
Notes: "Fourth edition."