The Potato Industry oe Colorado. 75 
the record early freeze at the Experiment Station. Potatoes must have 
rotation with clover, alfalfa, or peas; and Middle Park is no exception; 
and such rotation regularly practiced will bring amazing results with all 
crops grown. This region, especially with a James Peak tunnel, will be 
the closest mountain potato section to the Denver markets. Early potatoes 
can be ready at 8,000 feet by September 1. In 1909, our yields of Pearls 
—a medium late sort—were about 12,000 pounds per acre, on sage brush 
land at this point. 
The Seed Grown on Sage Brush Land, at high altitudes, if watered 
early, we find good seed for the Greeley district. See Montrose, Greeley, 
and Julesburg. 
The Pearl—first year Greeley or dry land seed—is the best main- 
crop potato for the Park. Rurals might be better on the heavier soils but 
are pretty late in maturing. For earlies the Cobbler and the Ohio are 
the ones to plant. 
YIELDS AT PARSHALL 
Planted 15x38. 
Stake 
Variety and Source 
Total 
Stand 
108 
Pearl—6 yr. Greeley . 
3168 
95 
106 
Pearl—2 yr. Del Norte . 
5040 
88 
116 
Pearl—1 yr. Parshall . 
5760 
93 
104 
Pearl—1 yr. Greeley . 
5904 
88 
120 
Pearl—1 yr. G. Sod. 
5616 
95 
105 
Pearl—2 yr. Greeley . 
5184 
94 
107 
Pearl—3 yr. Greeley . 
6048 
95 
119 
Peachblow—Flagler . 
6348 
89 
110 
Downing—Carbondale. 
3816 
72 
102 
Challenge—Greeley . 
5184 
88 
101 
Snowflake—Greeley. 
3024 
70 
115 
F. Snowflake—Maine . 
6984 
86 
109 
P. Seedling—Stove P. 
3096 
48 
113 
E. Ohio—Red River. 
2664 
94 
112 
Six Weeks—Maine . 
2736 
95 
111 
Cobbler—Maine . 
2160 
75 
103 
W. Ohio—2 yr. G. 
1584 
95 
114 
N. Beauty—Maine . 
1018 
70 
117 
E. Rose—Parshall . 
3876 
74 
JULESBURG 1910 
Our plot here was an old alfalfa field, a gray loam, deep, with heavy 
but porous subsoil. It was irrigated early, plowed 8 inches deep, har¬ 
rowed, leveled, rained upon and harrowed before planting on May 4. There 
are few soils better than this type at Julesburg. The reservoir of the 
Julesburg Irrigation District broke its* dam earny in the season, and the 
potatoes were never irrigated, while the rainfall was below normal. The 
potatoes w r ere harrowed before and after they came up, and this was of 
great benefit. Potatoes intended to be harrowed should be planted deep, 
so as not to be harrowed out. 
Boxing is a British title applied to potatoes sprouted in crates and 
set out by hand. Quicker growth and better yields are claimed for the 
practice. The early season was dry and unfavorable for this test. Our 
conclusions here, at Greeley, and Montrose are that better results are ob¬ 
tained by the use of stubby, sprouted, just started, or greened seed pota¬ 
toes, in planters. 
Wisconsin Seed tested here proved to be 78% Pearls and 22% mixed 
Rurals and other sorts. Such mixtures are not tolerated in established 
Colorado potato regions. 
Dryland Possibilities.—The most significant result of the work in 
1910 at Julesburg and one of the most important facts in Colorado agri¬ 
culture, was brought out because the reservoir broke, and the plot became 
a dry land experiment. The yields of 10,000 pounds per acre on the 
