1949: SUPERPHOSPHATE FERTILIZER

Agricultural scientists are using radioactive substances as tracers in fertilizers to improve their effectiveness. By mixing isotopes like radio and phosphorus with standard fertilizers, agronomists aim to enhance the yield of staple crops such as potatoes, beans, tomatoes, and corn.

What is the primary purpose of using radioactive substances in fertilizers?

• To enhance the color of the crops

• To increase the shelf life of crops

• To reduce the cost of fertilizers

• To trace the effectiveness of fertilizers

Which substances are mixed with standard fertilizers to act as tracers?

• Radio, phosphorus, and other isotopes

• Nitrogen and potassium

• Calcium and magnesium

• Sulfur and zinc

What is the ultimate goal of using fertilizers with radioactive tracers?

• To improve the taste of vegetables

• To make crops resistant to pests

• To decrease the growth time of crops

• To increase the yield of staple crops

Which of the following crops are mentioned as benefiting from these fertilizers?

• Carrots and lettuce

• Wheat and rice

• Potatoes and beans

• Peas and lentils

Who is primarily responsible for finding more effective ways of using these fertilizers?

• Botanists

• Agronomists

• Chemists

• Biologists