32 BULLETIN 1155, U. S. DEPARTMENT OF AGRICULTURE. 
fourth year land the short-grain midseason group, represented by 
Selection No. 1561-3, produced the highest average yield; the short- 
grain late group, represented by Selection No. 115, ranked second: 
the long-grain midseason group, represented by Selection No. 113, 
ranked third; the medium-grain midseason group, represented by 
Early Prolific, ranked fourth: the long-grain late group, represented 
by Carolina Gold, ranked fifth; and the short-grain early group, 
represented by Colusa, ranked sixth in average yield per acre. \ : ~ 
During the 5-year period from 1914 to 1918, inclusive, the short- 
grain late group, represented by Wataribune, gave the highest 
average yield; the short-grain midseason group, represented by 
Butte, ranked second; the medium-grain early group, represented by 
Pilit, ranked third; the short-grain early group, represented by 
Ai/EPAGE Y/ELD //V POUMPS PEP ACPE. 
\2,529 
SHORT- GPA/AJ 
EAPLY: 
C./.M9 
SPAG//UO/.O 
/585 
COLUSA 
/600 
Af/DSEASOAL 
surr£ . 
/S64 
LATE- 
W4Z4X/8U/VE 
/SB/ 
OM4CP/ 
/57S 
SP//V/?/*/ 
/642 
AfED/L/M- GRA/A/ 
EAPLK' 
p/i/r 
8/ 
\409O 
WL^2S6 
\4.94S 
4,738 
LATE-' 
/24J ■MHHHHM^^; 7 
\3,486 
LOA/G-GPA/A/ 
LATE' 
HO/VDUPAS /64J ■■■^^^■■■Hl^l 2, 9C4 
CA#OL/MA WMT£ /644 ■■■■^■■■■■H 3,2/4 
CAXOL/A//I COW /645 ■■^■■■■■■■i 2,9/3 
Fig. 12.— Average acre yields of 12 varieties of rice grown at the Biggs Rice Field Station during the 9-year 
period from 1913 to 1921, inclusive. 
Colusa, ranked fourth; the long-grain late group, represented by 
Carolina White, ranked fifth; and the medium-grain late group, 
represented by C. I. No. 1258, ranked sixth. The average yields of 
12 varieties of rice grown at the Biggs Rice Field Station from 1914 
to 1918, inclusive, are shown graphically in Figure 12. 
During the 9-year period from 1913 to 1921, inclusive, the short- 
grain late varieties, Wataribune, Omachi, and Shinriki, produced 
higher average yields than the short-grain midseason Butte variety. 
Butte, however, has yielded better than any of the long-grain late 
varieties, Carolina Gold, Carolina White, or Honduras. 
The highest yields of rice are obtained on new or first-year land, a 
marked decrease in yields usually occurring with each successive 
crop year. During the 3-year period from 1913 to 1915, inclusive, 
the Wataribune variety produced an average yield of 6,290 pounds 
per acre on new land; for the 3-year period from 1917 to 1919, 
