The Potato Industry op Colorado. 73 
White Sprouted seed is found among all the Rurals of the Montrose 
district that we have seen, and their white blossoms are conspicuous among 
the purple in the fields. This is a serious defect to the eyes of a potato 
man in the otherwise wonderful Rurals shipped from the Uncompahgre, 
and we thought to find that a selection of the white sprouted sort at 
planting time would show a lower yield. Such is not the case. They 
exceeded the Rurals from the same lot by 3300 pounds gross per acre 
and by 1900 pounds net. Their shape is, however, inferior and is still 
worse in poorer conditions.* The white sort is doubtless Carmen I. See 
its yield at Greeley. 
CARBONDAIiE 
Record Yields for unmanured, unfertilized field culture were here 
obtained on our plot. Such was the uniformity of yield at the upper and 
lower ends of rows and from one side of the field to the other, that we 
believe that the whole piece would have gone the same as any part if 
planted to the same sort. 
Early Sorts.—Note the 28 00 pound increase in the Cobbler yield by 
the 5 y 2 inch planting (A and B) and that at stake 128 the very earliest 
sorts were made to yield 20,000 pounds per acre by planting in 20 inch 
rows and cultivating with a beet cultivator.t The excellence of the 
Russet as an early potato is here as elsewhere strongly indicated. (Stakes 
129 and 130). Note also that it responds here strongly to seed selection. 
The more oval seed produced 62 57 pounds more ware per acre than the 
slim seed. 
The Snowflake has been a famous potato. Believing that the great 
work done by Carbondale growers with the Peachblow and the Triumph 
could be repeated with the Snowflake, we sorted over a large quantity of 
Greeley Snowflakes, and planted the best, to be hill selected here, and then 
grown on the dryland, to be thence supplied in 1913 to all the State, as a 
home favorite potato. The yield (S. 12 6 ) promises success. 
The Pearls, especially the locally developed Pearl, called Valley Prize, 
gave remarkably high net yields, without knots, cracks, hollowness or 
other defects. Stake 134 had a net yield over 1%-inch screen of 598 
bushels, and the next highest net yields were of Pearls from Pearl seed 
grown in the valley at Carbondale, and at Greeley, and from Messrs. 
Sweets’ Peachblows and Gold Coins. 
That Rurals were Omitted from the Carbondale lists is one of the 
oversights of a strenuous season. This variety now leads all others in 
the United States. From what it does at Del Norte and Montrose and 
in private hands at Carbondale, we do not hesitate to recommend it for 
planting beside the Peachblow as a late sort. It will doubtless lead all 
other white potatoes in yield, uniformity, beauty,$ and high quality at 
Carbondale. For medium, the Pearl will be standard. For early the 
Russet and the Cobbler promise to be standard. We would not at Carbon¬ 
dale go outside this list. It has been a misfortune that all varieties do 
well here. 
Close Planting will be the thing for Rurals, as close as four inches 
perhaps. At 124, note that the Peoples gave a good profit on using 
twice as much seed, and tlxat when three times as much seed was used it 
returned in the crop. This 3-2/3 inch planting also gave a much in¬ 
creased percentage of seed size. Compare also Pearls so planted at stakes 
138 and 139, where the closest planting reduced the yield but produced 
more seed. See also Del Norte for close planting of Rurals and Peach- 
blows. 
*The new sage brush lands of the Uncompahgre should develop a 
trade for seed Rurals but will find that pure seed will be demanded. 
t£ee Early Potatoes, a division of this bulletin. 
?Rurals come out of the ground clean because of their smooth skin. 
