The National Geographic Magazine, Volume 96National Geographic Society, 1949 - Geography Indexes kept up to date with supplements. |
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Page 147
... plant , we know where to look for different forms having characteristics that might be valuable in present - day crop breeding . Plant - hunting expeditions are sent to the supposed region of origin of a species in the hope of finding ...
... plant , we know where to look for different forms having characteristics that might be valuable in present - day crop breeding . Plant - hunting expeditions are sent to the supposed region of origin of a species in the hope of finding ...
Page 148
... plant is finding the place where its ancestral form is still growing in the wild . But finding wild forms as weeds in a particu- lar place , or finding cultivated plants that have escaped into the wild , proves nothing about their ...
... plant is finding the place where its ancestral form is still growing in the wild . But finding wild forms as weeds in a particu- lar place , or finding cultivated plants that have escaped into the wild , proves nothing about their ...
Page 153
... plants might grow somewhat larger than in the wild or make somewhat larger yields , but they would still be " wild " plants . Merely continuing to plant all the seed from such plants year after year , and tending the plants carefully ...
... plants might grow somewhat larger than in the wild or make somewhat larger yields , but they would still be " wild " plants . Merely continuing to plant all the seed from such plants year after year , and tending the plants carefully ...
Contents
Adobe New Mexico By Mason Sutherland With 28 illustrations in color from natural | xiii |
Laplands Reindeer Roundup 14 illustrations in color from naturalcolor photographs | xxvi |
New Discoveries on the MidAtlantic Ridge By Maurice Ewing With 23 illustrations | xxxix |
Copyright | |
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