14 
Colorado Experiment Station 
The relation of the stooling habits in alfalfa to the vigor and vi¬ 
tality has been repeatedly shown in the nursery and field tests of the 
past seven years. Plates Nos. 7 and 8 are two other views showing 
the contrast in the stooling habits of the different types. 
There seems to be a grading of the types to different degrees of 
hardiness. This can be seen in the irregular size and types shown 
in the plates in this bulletin, and in almost any field of alfalfa. ThP 
is evidently one of the reasons for the gradual loss of plants. The least 
hardy types are the first to be killed, the others following gradually as 
the conditions become more severe. There are evidently other fac¬ 
tors that go to make up resistance to cold besides the stooling habit. 
Plate No. 14. —A portion of another row in the same nursery, from 
commercial seed, showing the irregular types, many of which are undesir¬ 
able. 
There is a difference in the effects of frost on the green leaves and 
stems of the plants above ground. The dark colored foliage is apparent¬ 
ly more resistant than the light green color. Plates Nos. 9 and 10 show 
the effects of frost on two adjacent Turkestan plants. The light green 
one is frozen down; the dark green one has hardly a leaf hurt. 
Turkestan alfalfa, because of its. stooling habits, has been men¬ 
tioned in this bulletin as one of the hardy types. So far, it seems to be 
a desirable variety altho there is a wide variation in the different 
strains- There are also several objectionable features to the Turkestan 
