14 
Colorado Experiment Station. 
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Figure 3. Raspberries growing in a fifteen year old apple orchard. 
Note stunted effect on the raspberries next to the trees. 
Life of Plantation .—Eastern authorities claim that the best results 
are obtained when the plantation is not allowed 1 to grow longer than 
six or seven years. In Colorado it is thought that with the proper 
management and care a raspberry plantation will last from twelve to 
fifteen years. There are in the Loveland district at the present time 
plantations twelve years old and these seem to be as thrifty as younger 
ones. It is hard to give the life of a plantation as this depends 
largely upon the care given it. 
YIELDS. 
Yields for the raspberry plantation vary somewhat from year to 
year, it depends largely on the vigor and growth of the plant. An 
average yield for the black-cap raspberry is two hundred and seventy 
crates per acre; that of the red varieties is about three hundred seventy- 
five crates per acre. When we speak of crates we mean those which 
contain twenty-four pint boxes. In some cases the black raspberries 
are crated in quart boxes but unless for local market it is better to place 
them in pint boxes as the raspberries will hold up better. As a rule 
