6 
Colorado Experiment Station. 
before the fall plowing will put the land in a better state of moisture 
at planting time in the spring. 
Plenty of barnyard manure will take the place of a green crop. 
Perhaps barnyard manure does more good if applied after the plants 
are set than when used before. 
DISCUSSION OF VARIETIES. 
Although different varieties are more or less localized there are 
places in Colorado where it is thought that most any kind of raspberry 
could be grown. In the Eoveland district the Marlboro is grown more 
than any other variety. This is a red raspberry and requires winter 
protection by covering. At Canon City the black-cap is raised quitt 
extensively. Gregg is the variety most used. Each of these species, 
that is, the red and black-cap have their advantages. The red rasp¬ 
berry as a rule brings a better price on the market than the black. 
The black-cap varieties hold up perhaps a little longer in shipment and 
in many parts of the state do not need winter protection. On the 
western slope of Colorado the black-cap, red, and the purple cane 
varieties are found. In some places on the western slope none of these 
kinds are protected during the winter but it is thought that for the best 
growth and welfare of the plantation, the red varieties should be 
covered. 
The best red variety for Colorado is undoubtedly the Marlboro on 
account of its good shipping qualities. The Cuthbert is also a very good 
variety for home use as it has a better quality and flavor than the Marl¬ 
boro. Its chief objection is that it is a rather soft berry and will not 
stand shipment for any great distance. With careful picking and pack¬ 
ing the Marlboro will stand up from thirty-six to forty-pight hours 
depending somewhat on the temperature, while most of the other red 
varieties go down in from twelve to twenty-four hours. For evapor¬ 
ating purposes the black-caps are better than the red varieties on ac¬ 
count of their hardiness. When used for this purpose they can be 
picked by mechanical means thus doing away with hand picking. So 
far in Colorado there has been such a demand for raspberries to be 
used as dessert that it has not been necessary to resort to evaporating. 
In fact, during the last year there were not enough raspberries raised 
in Colorado to supply the local market. The following is a list of the 
different varieties of raspberries which are known to do well in Colo¬ 
rado. The purple cane varieties, as a rule, are the best for canning 
purposes. 
