PRESCRIBING FOR RUN-DOWN LAND
What the Soil Doctor is Doing to Improve Our Farms

(2)
THE SOIL DOCTOR AND HIS TONICS
Prescribing Remedies for Worn-Out Farm Land

(3)
DIAGNOSING ILLS OF THE SOIL
Science Offers Remedies for Depleted Farms

Other figurative titles like the following may be developed without much
effort from the ideas that soil "gets tired," "wears out," and "needs to
be fed":

(1)
WHEN FARM LAND GETS TIRED
Scientists Find Causes of Exhausted Fields

(2)
FIELDS WON'T WEAR OUT
If the Warnings of Soil Experts Are Heeded

(3)
BALANCED RATIONS FOR THE SOIL
Why the Feeding of Farm Land is Necessary for Good Crops