Date of Award:

5-1-1958

Document Type:

Thesis

Degree Name:

Master of Science (MS)

Department:

Biology

Department name when degree awarded

Botany

Committee Chair(s)

Herman H. Wiebe

Committee

Herman H. Wiebe

Committee

R. L. Smith

Committee

W. S. Boyle

Abstract

Injury to plants associated with fluorides was first noted about 25 years ago by investigators in Germany. Since that time, and with increasing industrialization of certain areas of the world, this physiological disease has become very Important economically. Fluorides have caused considerable loss to certain crops and to livestock that eat forage containing fluorides in toxic quantities. Johnson (1952) has estimated that the annual loss due to air pollution in the United States total $1,500,000,000 or $10 per capita and that the government and industry are spending about $100,000,000 each year to combat damages. The amount of this damage that is due to fluorides is not known, but in certain areas they are the major air pollutants.

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