The National Geographic Magazine, Volume 24National Geographic Society, 1913 - Geography Indexes kept up to date with supplements. |
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Page 57
... Plant Pathology of the Department of Agriculture , and his as- sistants have been conducting a series of investigations into the origin and his- tology of the crown gall . The crown gall is a plant disease which causes an annual loss to ...
... Plant Pathology of the Department of Agriculture , and his as- sistants have been conducting a series of investigations into the origin and his- tology of the crown gall . The crown gall is a plant disease which causes an annual loss to ...
Page 61
... plant . This they have named the Bacterium tumefaciens , or tumor - producing organism . Subsequent experiments showed that the most uniform success followed ex- periments upon young and rapidly grow- ing plants , it being often ...
... plant . This they have named the Bacterium tumefaciens , or tumor - producing organism . Subsequent experiments showed that the most uniform success followed ex- periments upon young and rapidly grow- ing plants , it being often ...
Page 575
... PLANT INTRODUCTION , DEPARTMENT OF AGRICULTURE Author of " Our Plant Immigrants , " " New Plant Immigrants , " and " Madeira , On the Way to Italy , " in the National Geographic Magazine Y TASK is to open to the readers of the NATIONAL ...
... PLANT INTRODUCTION , DEPARTMENT OF AGRICULTURE Author of " Our Plant Immigrants , " " New Plant Immigrants , " and " Madeira , On the Way to Italy , " in the National Geographic Magazine Y TASK is to open to the readers of the NATIONAL ...
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