20 



BULLETIN 976, U. S. DEPARTMENT OF AGRICULTURE. 



cent of the stalks formed heads, and these did not mature, which 

 made that seeding a failure 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 

 determine 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. 



/3/& /3/S /9/6 /9/7 /9/3 /9/9 



Fig. 9— Annual and average yields per acre, in bushels, of Manchu 

 kaoliang (C I. No. 171) in 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 in 1919 

 both the early and normal seedings had poor stands. The normal 

 seeding that year was almost a failure, averaging only about 1 1 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 

 seeding 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. 



