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" Mass., and presented to the College museum by Mr. BH Averell. Prof. Stockbridge, last fall, washed out a root of common clover, one year old, growing in the alluvial soil near the Connecticut River, and found that it descended perpendicularly to the depth... "
Public Documents of Massachusetts - 第 210 頁
Massachusetts 著 - 1875
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Annual Report of the Secretary of the State Pomological Society of ..., 第 4 卷

State Pomological Society of Michigan - 1875
...surround and enclose the adjoining pebbles. A similar root of an elm was recently dug up in Westfield, Mass., and presented to the College Museum by Mr....is the fact that the lower roots are either unable fco penetrate the subsoil or to find in it the requisite supplies of food. He also states that his...
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Practical Farm Drainage: Why, when and how to Tile Drain, 第 1-2 篇

Charles Gleason Elliott - 1882 - 92 頁
...clover, when growing in a rich, mellow soil, extend far, both laterally and vertically. Prof. Stockbridge 'washed out a root of common clover, one year old,...descended perpendicularly to the .depth of eight feet.' Lucern roots are stated to reach a depth of twenty and even thirty feet. Alderman Mechi, in England,...
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The Indian Forester, 第 16 卷

1890
...clover, when growing in a rich mellow soil, extend far both laterally and vertically. Prof. Stockbridge washed out a root of common clover one year old growing...that it descended perpendicularly to the depth of 8 feet. Lucerne roots are stated to reach a depth of 20 and even 30 feet. Alderman Nechi in England...
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Practical Farm Drainage: A Manual for Farmer and Student

Charles Gleason Elliott - 1908 - 188 頁
...when growing in a rich and mellow soil, extend both laterally and vertically. Professor Stockbridge washed out a root of common clover, one year old,...descended perpendicularly to the depth of eight feet. Lucern roots are said to reach a depth of twenty, and even thirty, feet." Authentic examples of this...
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