62 
BULLETIN 1175, U. S. DEPARTMENT OF AGRICULTURE. 
(plants 6 inches apart in rate 1, rows 44 inches apart, and in rate 4, 
rows 88 inches apart, and plants 12 inches apart in rate 3, rows 44 
inches apart, and in rate 8, rows 88 inches apart) the plants in rows 
88 inches apart produce more suckers than the plants in rows 44 inches 
apart. These facts indicate that under similar conditions the dis- 
tance between plants in the row influences suckering more than the 
distance between rows, though the distance between rows influences 
suckering to a slight extent. 
The rates in rows 88 inches apart have produced a higher average 
percentage of headed stalks than the rates in rows 44 inches apart. 
This tendency was especially noticeable in 1918, a poor season for 
sorghums. 
The total crop yields for the 88-inch rows are not as high as those 
for the corresponding rates in rows 44 inches apart. This is one 
fact to be considered in Sunrise kafir, which is a combination grain 
and forage crop. There is a closer correlation between the total crop 
and the grain yields in the Sunrise kafir rates in rows 88 inches apart 
than in any other division of the spacing experiments. 
Table 31 shows the annual and average acre yields in bushels of 
60 pounds from the five spacings of Sunrise kafir in rows 88 inches 
apart for the five years from 1917 to 1921, inclusive. Considering 
the 5-year average yield, rate 4, one plant to 5.3 to 6.8 inches of row 
space, has the highest average, with 23.5 bushels per acre. This 
rate of spacing plants in the row made the highest yield in 1921 
and as high a yield as any of the other rates in 1917 and 1920. The 
lowest average yield was 21.7 bushels, produced by rate 10, the thin 
spacing, which averaged one plant to each 15 inches of row space. 
This gives an annual difference of 1.8 bushels per acre between the 
highest and the lowest yielding spacings of Sunrise kafir in rows 88 
inches apart. 
Table 31. — Yields of Sunrise kafir in rows 88 inches apart in the spacing experiments 
at the Woodward Field Station during the 5-year period from 1917 to 1921, inclusive. 
Rate 
No. 
Yields per acre (60-pound bushels). 
Row space per plant. 
1917 
191S 
1919 
1920 
1921 
Aver- 
age. 
2 
19.9 
22.5 
22.5 
21.8 
19.7 
11.0 
11.1 
8.6 
12.8 
12.6 
25.3 
22.3 
19.7 
24.0 
23.1 
26.4 
30.4 
30.2 
30.4 
28.7 
30.2 
31.1 
30.0 
24.4 
22.6 
5.3 to 6.8 inches 
4 
6 
8 
10 
23.5 
8.8 to 9.5 inches 
11.6 to 13 inches 
22.2 
22.7 
14.3 to 15.2 inches 
24.5 21.7 
COMPARATIVE YIELDS FROM 44-INCH AND 88-INCH ROWS. 
Table 32 shows the annual and average acre yields of Sunrise kafir 
in row^s 44 inches and 88 inches apart in the spacing experiments. 
This table permits easy comparison between the yields obtained from 
the different spacings of plants and rows. 
Group A, the thick rate of plant spacing in the row, averages 6.8 
inches of row space to the plant in the rows 44 inches apart and 3.5 
inches of row space per plant in the rows 88 inches apart, or approxi- 
mately 21,000 plants to the acre. At this spacing the ordinary 
rows, 44 inches apart, have outyielded the wide rows, 88 inches 
apart, by an annual average of 4 bushels per acre for the five years. 
