104 
Colorado Experiment 'Station 
duced with less than 0.75 foot of water to the acre. On the other 
hand, the second highest percentage of protein, 9.156 percent, is found 
in wheat produced with the application of the maximum amount of 
water, 3.28 feet to the acre, and the next highest percentages occur with 
the application of 1.62 and 2.34 feet. The total range of the percent¬ 
ages of protein is so limited and the differences that we find being 
no greater than is found on different plots of land of the same char¬ 
acter, and receiving the same treatment, we consider that these experi¬ 
ments, in so far as they are conclusive, indicate no relation between 
the amounts of water applied and the percentage of protein contained 
in the kernels. The total lack of any relation between the water ap¬ 
plied and the variation of the percentage of protein produced, supports 
this view. 
The winter-wheat given was harvested 340 days from planting. 
How much water fell as rain during the autumn and winter months 
is not given in the notes, nor is the date of ripening, but I take it that 
this date and that of harvesting were close together. This wheat is 
(plump, with a great deal of yellow-berry or mealy wheat. The yields 
for irrigated wheat were very low, 3.7, 12.29 and 17.5 bushels to the 
acre- The amounts of water applied as irrigating water were 0.47, 
0.89 and 0.93 acre-foot, and the analyses throughout are almost iden¬ 
tical, showing a low percentage of protein for this variety, 10.6 percent, 
but it is very near the percentage that we have found for samples of 
dry land wheat, and higher than some exceedingly mealy samples of 
this variety. We have found, generally, about 13.0 percent of protein 
for this variety of wheat grown with irrigation. 
The experiments of 1913 were not entirely satisfactory to Mr. 
Bark, so he endeavored to make those of the next year more satisfac¬ 
tory to himself and, for my purposes they are much more conclusive. 
An Additional Test at Boise, Idaho, In 1914 
The experiments here described were made on six plots of land, 
each approximately one-tenth of an acre in area. These plots were 
arranged in two series of three each, the series abutting on one an¬ 
other. One series was not fertilized, the other received an application 
of well-rotted horse and cow manure at the rate of 15-67 loads to the 
acre. The land was plowed in November, harrowed and disced in the 
spring, seeded 2 April, and corrugated 4 April. Wheat practically all 
up by 25 April. One plot in each series received the same amount of 
water, i.e., they were paired, one manured and one unmanured. One 
of these pairs received one acre-foot, one 2 and one 3 acre-feet of water. 
The manured plots yielded as follows per acre: With i acre foot of 
water, 4,033 pounds of straw and 1,467 pounds of wheat; with 2 acre- 
feet of water, 4,228 pounds of straw and 1,663 pounds of wheat; with 
