ON THE CLASSIFICATION OF CULTIVATED RICE. 15 
field than in common field. Moreover, we can grow common rices on fields 
which are not watered and in many cases they yield fairly well.t Some 
varieties of rice in India are cultivated both on watered fields and on 
fields only flooded during germination. 
From these facts we may imagine that most of the so called upland 
rices of the present day were formerly the same with the common varie- 
ties; and we can hardly draw a line between common or aquatic rice and 
upland rice. However, some of the latter, in consequence of repeated 
cultivation on dry fields for many years have acquired the character of 
enduring drought and can grow and yield fairly well on lands where 
common rices usually fail. Thus it is practically useful to make a rea- 
sonable classification of rice according to their water-requisite. 
(2) Early and late rice. 
This classification is according to the difference of season of growth, 
or days of growth when sown at the same time. 
Most Indian authors have assorted Indian rice into five seasonal 
groups as follows: 
Sown in Transplanted in Harvested in 
CREED Re Se April—May Not transplanted. July—Sep. 
ET oes re at Ak a May en psa 19 November 
Boro, kharif (Autumn) June—July  July—Aug. Sep.—Oct. 
Boro, rabi (Spring) ....Oet.—Nov. Nov.—Dec. May 
TRAV ORG cc 6 os ce sin xeon December Not transplanted Sep.—Oct. 
In Siam there are two different groups of rice according to the season 
of growth, viz: 
Sown in Transplanted in Harvested in 
REO BAG te aoe. nu Jan.—Feb. Feb.—Mar. May—June 
HOS AIC en. en June— July July—Sep. Dee. —Jan. 
In Japan the time of sowing generally differs according to the dis- 
trict; and in the same district it may differ according to the variety, 
1. Report of the Agricultural Experiment Station Vol. 15, No. 10. 
