tion. The arrangement of plats and yields are given in the 
following lists: 
Yield of larger 
Variety. Fertilizer. Potatoes per 
Plat in Tbs. 
Early Ohio. None 16 
“ “ Tankage 28 
“ “ . Bone Meal 22 
“ “ None 16 
“ “ Tankage 9 
“ “ . Bone Meal 18 
“ “ None 13 
Bose Seedling. None 30 
“ “ Tankage 39 
“ “ . Bone Meal 26 
“ “ None 24 
“ “ Tankage 30 
“ “ . Bone Meal 28 
“ “ None 38 
Average of all Plats.. 24 
Average of Plats with no Fertilizer. 23 
Average of Plats with Tankage. 26 
Average of Plats with Bone Meal. 23 
Yield of small 
Potatoes per 
Plat in Rs, 
22 
16 
26 
17 
10 
13 
14 
38 
41 
30 
28 
39. 
33 
45 
26 
27 
26 
25 
The point that shows most clearly is the great difference 
between neighboring and similarly treated plats. This can 
always be expected in irrigated ground. The yield depends 
very largely on the moisture of the ground and even under 
the best of irrigation this is much more irregular than where 
water is supplied by rain. 
The second point is that the differences between plats 
similarly treated are greater than between the average of 
plats differently treated. This shows the necessity in work 
of this kind .of having duplicate plats. 
The fertilizer has on the average, increased the yield but 
it has not had the large and decided effect that is produced 
by a soluble fertilizer used in a country where the soil is 
moist in early summer. Both bone meal and tankage require 
moisture to allow the acids of the soil to act on them and 
make them soluble and under Colorado conditions, where 
there is but little rain and no irrigation water is applied 
until the middle of summer it is not surprising that they do 
not prove successful. 
NOn-SflCCHARINE SORGHUBS. 
In the eastern part of Colorado and the western portions 
of Nebraska and Kansas, the non-saccharine sorghums, such 
as Kaffir Corn, Jerusalem Corn, Milo Maize, etc., have come 
to be largely grown because they require so little water to 
