8 
The Colorado Experiment Station 
Figure 5. 
however, that the spring- was very favorable to getting* the canes 
up early, so we were not privileged to see the benefit, if any, from 
the use of the straw. The experiment was not without its lesson, 
however, for it demonstrated very clearly that straw, even though 
covered with soil, is not an adecpiate protection. Although not 
all of the canes were killed, a very large proportion never came 
out into leaf. 
As checks on this method of covering, part of the same row 
was left entirely uncovered, and an adjacent row was covered with 
soil. Every cane that was left unprotected was killed, while every 
one that was covered with soil grew. The results of these experi¬ 
ments are shown in Eigs. i and 2. 
The right-hand row of Fig. 1 was left uncovered and all the 
canes were dead. The left-hand row was covered with soil, and 
