304 
Journal of Agricultural Research voi. xxm. No. $ 
BERMUDA GRASS 
The favorable effect of temperature alternations is strikingly evident in 
Figure 5. A very narrow alternation (5 0 C.) is almost without effect, 
and a io° alternation is much less effective than a 15 0 or 20° alternation. 
Fig. 5.—Average rates and percentages of germination of three lots of Bermuda grass seed under 13 
temperature conditions. 
Bermuda grass seed germinates at high temperature, its germination 
being better at 35 0 and with the 5 0 alternation below 35 0 than at lower 
constant temperatures or with 5 0 alternations in a lower temperature 
