News & CommentScientific Events THE AMERICAN SOCIETIES OF AGRONOMY AND SOIL SCIENCE Science 06 Nov 1942:Vol. 96, Issue 2497, pp. 422DOI: 10.1126/science.96.2497.422 Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears above.
Science Vol 96, Issue 249706 November 1942 Table of Contents Print Table of Contents Back Matter (PDF) Front Matter (PDF)