The National Geographic Magazine, Volume 104National Geographic Society, 1953 - Geography Indexes kept up to date with supplements. |
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Page 203
203 through a plant with Geiger counters . Toothpick doses are sometimes so powerful their effects can be traced to the second or even the third generation . In Beltsville's hormone greenhouses I saw beanstalks with stems that climbed ...
203 through a plant with Geiger counters . Toothpick doses are sometimes so powerful their effects can be traced to the second or even the third generation . In Beltsville's hormone greenhouses I saw beanstalks with stems that climbed ...
Page 204
I saw selective plant poisons applied to soil from which corn , wheat , and soybean seedlings would grow unharmed , but never a weed . Using such " pre - emergence " soil treatments , farmers may one day mix weed killers with fertilizer ...
I saw selective plant poisons applied to soil from which corn , wheat , and soybean seedlings would grow unharmed , but never a weed . Using such " pre - emergence " soil treatments , farmers may one day mix weed killers with fertilizer ...
Page 213
A wild desert plant called canaigre , which grows across dry wastelands of the Southwest , may take the ... To enable farmers in dry regions to grow canaigre , high - yielding plants are being selected from the wild and domesticated .
A wild desert plant called canaigre , which grows across dry wastelands of the Southwest , may take the ... To enable farmers in dry regions to grow canaigre , high - yielding plants are being selected from the wild and domesticated .
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Contents
Bi PAGE | v |
All America Mingles in the Prairie State | ix |
The Yankee Sailor Who Opened Japan Commodore Perry and His Black | xvii |
Copyright | |
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Bibliographic information
| Title | The National Geographic Magazine, Volume 104 The National geographic magazine, National Geographic Society (U.S.) |
| Contributor | National Geographic Society (U.S.) |
| Publisher | National Geographic Society, 1953 |
| Original from | the University of Michigan |
| Digitized | 20 Feb 2009 |
| Export Citation | BiBTeX EndNote RefMan |