ArticlesAddress THE FERTILITY OF THE SOIL See allHide authors and affiliations Science 16 Sep 1910:Vol. 32, Issue 820, pp. 363-371DOI: 10.1126/science.32.820.363 A. D. HALLFind this author on Google Scholar Find this author on PubMed Search for this author on this site Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears below.