20 
BULLETIN 976, U. S. DEPAETMENT OF AGEICULTURE. 
cent of the stalks formed heads, and these did not mature, which 
made that seeding a failm-e in grain production. 
There is a wide range between the grain yields for the different 
dates of seeding in the same year and also for the same dates in the 
different years. Therefore, it is necessary to study the averages to 
determiue the best date to sow. This can be seen in Table IX and 
at a glance in figure 8. 
MANCHU KAOLIANG. 
The agronomic data recorded in the date-of-seeding experiments 
with Manchu kaoliang are shown in Table VIII, and the yields are 
shown for comparison in Table IX and graphically in figure 9. 
60i 
I 
10 

A 
' / t 
/ 
/ 
/ , 
/ 1 
h 
L/9TE 
-if 
1/ 
16.1 
1 
1 
\ ^ 
/3/^ /Q/S /Q/e /3/7 /9/8 /S/9 
Fig. 9 — Annual and average 5ields per acre, in bushels, of Manchu 
kaoliang (C I. No. 171) iu the date-of-seeding experiments at the 
Amarillo Cereal Field Station in the 6-year period from 1914 to 1919. 
inclusive. Horizontal lines show averages for the period. 
The stands obtained in most cases were good. In 1916 the normal 
seeding had a thin stand, averaging one plant to 25^ inches of row 
space. The late seeding had a very poor stand in 1917, and iu 1919 
both the early and normal seedings had poor stands. The normal 
seeding that year was almost a failure, averaging only about 11 plants 
to the row of 132 feet. 
Manchu kaoliang is earlier than any other variety included in these 
experiments. The vegetative period ranged from 56 days in the late 
seediug in 1919 to 91 days in the early seeding in 1918. The early 
seeding usually required the longest and the late seeding the shortest 
vegetative period. The total growing period ranged from 80 days 
in the normal seeding in 1914 to 123 days in the early seeding in 1918. 
Under average conditions from 95 to 100 days are required for this 
crop to mature. 
