Nitrogen tantalizes mankind with the paradox of poverty in the midst of plenty. All living things on this planet must have nitrogen in their food. The earth’s atmosphere contains far more than enough nitrogen to satisfy the requirement, yet relatively few of the species populating the earth are able to metabolize nitrogen from the atmosphere. This circumstance gives rise to important ecologic and economic consequences, and poses challenging questions for several branches of science. The first isolation of free living nitrogen fixing bacteria by Winogradsky and Beijernck stimulated attempts to assess the importance of non-symbiotic nitrogen fixation in the nitrogen economy of the soil. Though numerous papers have accumulated, they also provide opportunities for controversy ranging from polite disagreement to acrimonious debate, and most of them need careful reevaluation.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.115380 |
| Date | January 1964 |
| Creators | Chang, Pin-Chuan. |
| Contributors | Knowles, R. (Supervisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science. (Department of Agriculture.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: NNNNNNNNN, Theses scanned by McGill Library. |
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