EXPERIMENTS WITH DURUM WHEAT. 59 
Section 1 of Table XXXIII shows the actual average acre yields 
obtained from each wheat. Section 2 shows the same data expressed 
in percentages. The yield of the best durum variety is taken as 100 
per cent in each case. The data in this table are the same as those 
shown graphically in figures 8, 12, and 13. 
The actual performance is seen more readily in the first section of 
the table, where yields are given in bushels per acre. The compara- 
tive performance, which indicates in large measure the comparative 
value, is seen much more readily in the second section of the table, 
where the results are expressed in percentages. After the detailed 
presentation of these data in Tables III to XXXII, inclusive, only a 
brief summary seems necessary. 
THE SUBHUMID PRAIRIE AREA. 
In studying the summarized results from the nine stations in the 
subhumid prairie area, certain facts stand out plainly, as will be seen 
in Table XXXIII. 
(1) In general, the durum wheats are not adapted to the humid 
conditions often obtaining in the eastern part of this area, but they 
do comparatively well in the subhumid northwestern part. 
(2) In the southern part of the prairie area, which includes the 
eastern portions of Kansas and Nebraska, neither durum nor common 
spring wheats do well. 
(3) Wherever the hard red winter wheats of the Crimean group can 
be grown they greatly outyield any spring wheat. 
(4) In the northeastern portion of this area, under the conditions 
obtaining at Ashland, Wis., and St. Paul, Minn., winter wheat is 
reaching the northern limits of its present culture and is not so out- 
standingly superior. The durum wheats are equal in yield to some 
of the common wheats and poorer than others. The value of the 
durums will depend on the quality of their grain and the need which 
exists for their rust resistance. 
(5) In the northwestern portion of this area, including the western 
part of Minnesota and the eastern parts of the Dakotas, the durum 
wheats have a much higher comparative value. They largely out- 
yield the spring common wheats and nearly equal winter wheat in the 
districts where it can be grown at all. 
(6) Of the varieties of durum wheat tested Arnautka is best 
adapted for growing in western Minnesota and the eastern portions of 
the Dakotas. 
THE GREAT PLAINS AREA. 
A study of the summarized results from 15 stations in the Great 
Plains area, shown in part in Table XXXIII, supports the following 
conclusions : 
(1) Durum wheats produce very well in all but the southern 
part of this large area. 
