RICE EXPERIMENTS IN CALIFORNIA. 
11 
The seed bed each year was good. Fallow ground slaked by rairi 
and sunshine can with little effort be reduced to a perfect seed bed. 
The stands obtained each year were good, except those on the broad- 
cast plats in 1913. On the drilled plats the highest yield was ob- 
tained from the heaviest rate of seeding in five of the eight years. 
In one of the eight years the highest yield was obtained from the; 
medium rate of seeding and in two from the lowest rate of seeding. 
Table 8. — Annual and average yields obtained in the rate-of-seeding experiments with 
Wataribune rice at the Biggs Rice Field Station, Biggs, Calif., during the 9-year period 
from 1913 to 1921, inclusive. 1 
Yield per acre (pounds). 
Rale of seeding. 
1913 
1914 
1915 
Seed drilled: 
60 pounds 6,000 5,345 4,605 
80 pounds 6,360' 5,840; 5,440 
100 pounds 6,38015,805 6,180 
Seed sown broad- 
cast: 
60 pounds 2 4, 225 5, 670 4, 155 
80 pounds 2 4 955 6, 125 4, 435 
100 pounds 2 4 800 6, 080 5, 165 
1916 1917 
3,450 4,385 
4,211 4,950 
4,355 5,420 
3,550 4,100 
3,895 4,695 
4,453 5,065 
Aver- 
4,757 
5,360 
5,630 
4,340 
4,821 
5,112 
Rate of seeding. 
Yield per acre (pounds). 
1918 
Seed drilled: 
110 pounds 
ISOpouncs 
150 poancs 
Seed sown broad- 
cast: 
110 pounds 
130 pounds 
150 1 ounds 
2,940 
2,915 
2,875 
3,680 
3,215 
3,525 
1919 
3,675 
3,43!) 
3,95) 
2,905 
2,640 
3,450 
1921 
3,405 
3,375 
3,350 
3,235 
3,195 
2,970 
Aver- 
age. 
3,340 
3,240 
3,392 
3,273 
3,017 
3,315 
The 1920 yields are omitted because of damage before threshing 
2 Poor stands. 
The highest average yields were obtained from the heaviest rates 
of seeding, 5,630 pounds from the 100-pound rate in the first period, 
1913 to 1917, and 3,392 pounds from the 150-pound rate in the second 
period, 1918 to 1921. The average yields from the medium rates of 
seeding in these two periods were 5,360 pounds and 3,240 pounds per 
acre, respectively, and those from the lowest rates were 4,757 pounds 
and 3,340 pounds per acre. 
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Fig. 5.— Average acre yields of Wataiibune rice obtained in the rate-of-seeding experiments at the Biggs 
Rice Field Station during the 5-year period from 1913 to 1917, inclusive. 
On the drilled plats there was a marked increase in yield during 
the first period with each increase in rate of seeding up to 100 pounds 
per acre, but from the 110, 130, and 150 pound rates in the second 
period there was but little difference in the average yields per acre. 
The average yields in the rate-of-seeding experiments with rice 
drilled and broadcasted at the Biggs Kice Field Station from 1913 
to 1917, inclusive, are shown graphically in Figure 5. 
On the broadcast and harrowed plats the highest yield was ob- 
tained from the heaviest rate of seeding in four of the eight vents. 
In two of the eight years the highest yield was obtained from the 
medium rate of seeding and in two years from the Lightest rate 
