Published online 1 May 1966
Published in Agron J 58:359-361 (1966)
© 1966 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
Root Training by Plastic Tubes II. Geotropic Reaction of the Roots of Several Species1
H. C. De Roo2
In the greenhouse, the difference in ability of roots of different species to grow upward was appraised by growing plants in U-shaped tubing. In the field, plants grown in straight tubes were inserted vertically into the prepared plow layer. In curved tubes, cabbage and rape plants rapidly returned their fibrous root systems to their crowns; in the field, they bent upward from the impenetrable plow pan and permeated the plow layer. Other species, such as oats, showed little ability to grow upward in the soil.
1 Contribution from the Connecticut Agricultural Experiment Station, Valley Laboratory, Windsor, Conn.
2 Soil Scientist.
Received for publication November 5, 1965.
Copyright © 1966 by the American Society of Agronomy.
