RESEARCH IN THE UNITED STATES 1
HOW ARE RADIOISOTOPES USED IN RESEARCH? 2
They May be Used as “Tracers” 2
How Effective Are Radioactive Tracers? 3
PLANT NUTRITION AND METABOLISM 4
What Happens to Fertilizer in the Soil? 4
Do Plants Absorb Through Roots Only? 4
Where Should Fertilizer be Placed? 5
Do Fertilizers Move Fast in Plants? 5
What Else Do Radioisotopes Tell Us? 5
PLANT DISEASES AND WEEDS 8
How Can We Combat Plant Diseases? 8
Why Do Chemicals Destroy Some Plants? 10
ANIMAL NUTRITION AND METABOLISM 11
How Nutritious Are Various Feedstuffs? 11
Can Lean Meat be Estimated “on the Hoof”? 12
Does Thyroid Affect Milk—Egg Production? 13
More Tracers in Animal Nutrition Research 13
INSECTS 15
Where and How Fast Do Insects Travel? 15
How Far Do Insects Carry Pollen? 15
Are Predators Used to Destroy Insects? 16
Can Tracers Measure Spray Residues? 17
RADIOISOTOPES AS RADIATION SOURCES 17
Can Radiation Produce New Plants? 18
Can Radiation Destroy Germs and Insects? 19
How Does Radiation Affect Farm Animals? 22
What Else Can Radiation Tell Us? 22
CONCLUSION 23
SUGGESTED REFERENCES 24
United States Atomic Energy Commission
Division of Technical Information
Library of Congress Catalog Card Number: 64-60274
1962; 1963(Rev.)