RICE EXPERIMENTS IN CALIFORNIA. 
45 
sufficient value to be named and distributed. Caloro should become 
a valuable commercial variety in California. The 1921 reports on 
this variety in commercial fields were favorable. Caloro matures 
about 10 days earlier than late Wataribune and about two weeks 
later than Colusa on old land. 
WATARIBUNE. 
Late Wataribune (C. I. No. 1561) was brought to California by the 
Bureau of Plant Industry, United States Department of Agriculture, 
in 1909, when Charles E. Chambliss conducted the first varietal experi- 
ments with rice in the State. Wataribune rice was first grown in 
the United States in 1908 on the farm of S. Sabaira, a Japanese, at 
Webster, Tex. 8 The only objection to this variety is that it matures 
late in the season. In yield and quality it is probably the best variety 
that has been grown commercially in California. It was the leading 
commercial variety until 1917, but has since been almost entirely' 
Fig. 15.— Plat of nearly mature Wataribune rice at the Biggs Rice Field Sta ion, with part of the station 
buildings in the background. 
replaced by Early Wataribune, Colusa, Onsen, and Caloro, varieties 
which mature earlier. In the varietal experiments at Biggs for the 
nine-year period from 1913 to 1921 the late Wataribune was the 
highest yielding variety. A field of this variety on the Biggs Rice 
Field Station is shown in Figure 15. It tillers and yields well on 
either old or new rice land. It is late in maturing on new land, but 
is considerably earlier on old land. 
LESS IMPORTANT VARIETIES. 
Several additional varieties of rice are being grown on small acre- 
ages in California. Some of these were formerly popular, but have 
now been largely replaced by newer and better varieties. Others 
8 Chambhss, Charles E., and Jenkins, J. Mitchell. Some new varieties of rice. U. S. Dept. Agr. Bui. 
1127, 18 p., 4 pi., 3 fig. 1923. 
