76 BULLETIN 1260, U. S. DEPARTMENT OF AGRICULTURE. 
The results of these experiments at Amarillo are not in themselves a 
sufficient basis for specific recommendations, but their main features 
support the tentative conclusions that were deduced from the work 
at Hays and Chillicothe. The closer the spacing, the higher the 
average forage yields by a small but consistent margin. The grain 
yields are not at all decisive in themselves, but they indicate the 
reliability of an 8-inch to 12-inch row space for grain production. 
Spacing of the Rows. 
Since it is possible to vary the number of plants per acre by vary- 
ing the space between the rows as well as the spacing of plants in 
the row, experiments were carried out at Hays. Kans., and Chilli- 
cothe, Tex., to determine the effect of differing spaces between the 
rows on the yields of forage and grain. The experiments at Hays 
Fig. 22— Pink kafir in 
-inch rows at Hays, Kans., in 1919. The plat in the foreground had been 
thinned to a 12-inch row space per plant. 
were conducted with Pink kafir on duplicated twentieth-acre plats 
for the years 1919 to 1922, and at Chillicothe from 1918 to 1922 
with both Dwarf kafir and feterita on twentieth-acre plats. The 
spacing of plants in the row was arranged at both places, so that 
comparisons could be made of different row spaces in plats which 
had the same number of plants per plat. 
EXPERIMENTS AT HAYS, KANS. 
Pink kafir was used in the experiments at Hays, because it is a 
variety well adapted to climatic conditions there and can be depended 
upon to produce fair yields of both forage and grain. Climatic con- 
ditions during the progress of the experiment were rather favorable, 
and the stands obtained were uniformly good. Table 22 show- the 
yields of Pink kafir in rows 40 and SO inches apart, also rows alter- 
nately 40 and 80 inches. (Figs. 7. 22. and 23.) These three methods 
of arranging the rows are compared by using four rates of row space. 
