30 Colorado Experiment Station 
such varied physical conditions as we liave in Colorado. It is not 
only a question of climate, especially of rainfall and seasonal differ¬ 
ences due to altitude, but also a question of soil. The soil of the San 
Luis Valley, for instance, is very different from that of the Arkansas 
Valley, or of the Grand Valley, in its orijS^in and in its properties. The 
climates, too, of these valleys are very different. The San Luis Valley 
has an altitude of 7,500, the Grand Valley about 4,000 and the eastern 
portions of the Arkansas Valley about 3,000. They differ further in 
this, that the San Luis Valley is surrounded by high mountains. The 
range on the east side of it, the Sangre dc Cristo, is very high, possibly 
the highest in the State. Mount Blanca, its highest peak, attaining a 
height of 14,467 feet, while Las Animas, in the Arkansas Valley, is 
some T40 miles east of the mountains in the plains section and approxi¬ 
mately 4,500 feet lower. Irrigation is necessary in both sections. 
No reasonable number of general samples grown under such a 
variety of conditions, including both soil and climate, can give any def¬ 
inite information concerning the character of the wheat grown in the 
State. ■ The only thing that would be feasible, would be to study the 
grain produced in somd definite section whose conditions of soil and 
climate could be given. I, at first, thought that it might 'be possible 
for us to obtain enough samples from reliable parties to accomplish this 
broader purpose in a reasonably satisfactory manner. It would serve 
no good purpose to give all of the considerations which have lead us 
to abandon this notion. Those given must satisfy the reader, as they 
have sufficed to convince us that it is wise on our part to acknowledge 
our change of attitude. The facts stated give our reasons for pre¬ 
senting so few general samples in 1914 and none in 1915. Further, 
they explain why we have confined our efforts to the study of our own 
samples grown under fairly well known conditions. 
YELi.OW-HEKKY 
It will be noticed that the samples of Defiance from various lo¬ 
calities differ by a maximum of 6.859 percent of protein or 1.206 per¬ 
cent of nitrogen. The physical properties of the kernels indicated a 
very decided difference in these samples; those from La Jara and Del 
Norte present large, plump, mealy kernels, that from Del Norte weigh¬ 
ing 49.07 grains per 1,000 kernels. There were no flinty or part flinty 
kernels in this sample. It is an extreme case of yellow-berry wheat. 
The sample from Fort Collins presents smaller, somewhat shrunken, 
flinty kernels which weigh 30.65 grams per T,oa>: in the former sam- 
