68 The Colorado Experiment Station. 
tice. Growers have told us they had fine stands, when accurate 
count showed as low as 70 per cent. 
One-Fifth Colorado Crop Lost .—Thus there is a loss of about 
one-fifth of our crop annually by poor stand, or half at least of the 
profits. The Colorado crop has a minimum value of over $4,000,- 
000. One-fifth this amount is $800,000. 
Possibilities of Economic Benefits .—If there can be saved, by 
educational work and by accurate statement of the facts, one-eighth 
of this $800,000 for one year, or $100,000, the interest on the 
saving for a single year, at 5 per cent, annually would support 
permanent technical work for the potato industry. If one-fifth this 
loss can be saved annually, it would support the agricultural col¬ 
lege in all its branches. 
LOSSES BY DEFECTIVE STAND 
Iu per cents of wliole crop for stands running from 50% to 95%. 
Per 
cent. 
stand 
Typical skips for each stand stated in left hand 
column. 
Stand 
lost, 
per 
cent. 
Basis of 
10056 
stand 
or 100$ 
crop. 
Crop lost—per 
cent on crop 
secured. 
For every skip J4 hill is made up at sides, the 
rest is absolute loss. 
90 $ 
stand¬ 
ard. 
85$ 
stand¬ 
ard. 
95 
5 of one hill each. 
5 
3 
0 
0 
90 
8 of one hill each and 1 of two hills. 
10 
5 
0 
0 
85 
9 skips of one hill each and 3 of two each. 
15 
9 
4 
0 
80 
10 ones, 2 twos, 2 threes. 
20 
13 
9 
5 
75 
13 ones, 3 twos, 2 threes. 
25 
16 
13 
8 
70 
12 ones, 4 twos, 2 threes, 1 four. 
30 
21 
20 
15 
65 
12 ones, 4 twos, 2 threes, 1 four, 1 five.... 
35 
25 
27 
21 
60 
14 ones, 1 two, 2 threes, 2 fours, 2 fives... 
40 
30 
36 
30 
55 
10 ones, 11 twos, 3 threes, 1 four. 
45 
33 
42 
36 
50 
14 ones, 5 twos, 1 three, 2 fours, 3 fives... 
50 
37 
51 
44 
With very early sorts, loss of stand means nearly a pro¬ 
portionate loss in yield, and is much more than is above shown. 
Figuring how much he loses by a poor stand, a grower should 
decide what stand he should secure: 85 or 90 per cent. Then take 
the line of the table where he finds at the left the stand he actually 
secures, and in the columns to the right, under his standard stand, 
he will find his loss in crop, on the basis of what he secures. He 
will thus be able to figure how much expense he can afford to incur 
to care for seed and seed bed and to repair old or buy new planters. 
DRYLAND POTATO GROWING: Points of Difference from Other Potato 
Culture 
Cheyenne Wells 1910.—The yields here represent the minimum of 
what need be secured on suitable soils in the plains region. The land was 
native sod in 1894. It has been farmed each year since, without manure 
or rotation with peas, nor has it been summer tilled or fall plowed. The 
natural conditions both of soil and of season could hardly have been 
worse than in 1910. First class care and tillage with first class seed made 
a yield that would at least supply food, to a farm home, on the plains. 
Rotation with Peas, Beans and Alfalfa.—The results at Julesburg 
hold out a promise of large yields to the grower who will rotate with 
