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单词 root ball
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root ball
root ball n. (a) the mass formed by the roots of a plant and the soil between and around them; (b) = niggerhead n. 3a (rare).
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the world > plants > part of plant > root > [noun] > root-ball or rhizoplane
root ball1837
rhizoplane1949
1837 Gardener's Mag. 3 173 If out of doors, plant the vines 3 ft. from the front of the house, just covering the root-ball of each about 2 in.
1900 J. Simpson New Forestry xi. 141 The root-ball should not be prized or heaved up, but the spade should be only pushed in and withdrawn again.
1930 Sat. Evening Post (Philadelphia) 13 Dec. 11/2 Bogs of black muck dotted with devilish, rotating root-balls that throw a man waist-deep.
2008 L. Chalker-Scott Informed Gardener 29 When you upend a container and slide out the root ball, it's an innate response to handle those tiny white and brown strands gingerly.
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