Science: Help for Farmers

> A tractor-drawn stone-picking machine has been invented, whose revolving teeth can remove as much as twelve tons of egg-to head-sized rocks per hour from the top three inches of soil. Produced by Otis F. Reiter, a onetime Maryland farm boy with a piercing memory of stone-picking backaches, the machine has been hailed by farm journals as the greatest agricultural invention since the tractor. In this machine some experts see hope for a revival of Eastern agriculture, whose decline they blame largely on stony soil. Stoneless soil is 18% more productive than soil...

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