16 
Colorado Experiment Station 
results in germination. The seed beds most commonly used are blot¬ 
ters, strips of Canton flannel, sand, soil and sawdust. The last three 
named are used in either flats or pots. The kind of seed bed to use 
depends upon the size of seed and variety. The large seeds require 
more moisture than the smaller seeds, and blotting paper would not 
supply a sufficient amount, whereas Canton flannel would hold too 
Fig. 4. Weed seed set. This collection, of 24 different common weed seeds ma,y 
be purchased from The Colorado Seed Laboratory at cost price of 75 
cents. 
great a supply for the smaller seeds. In making germination tests 
care should be taken to keep the blotters and cloths moist, but not 
saturated or dripping. 
The following table will serve as a guide in reference to seed beds, 
temperature, and duration of test: 
