38 



BULLETIN 976, U. S. DEPARTMENT OE AGRICULTURE. 



AGRONOMIC DATA. 



Table XX shows the agronomic data recorded for the environ- 

 mental experiments conducted at the Cereal Field Station, Amarillo, 

 Tex., in the 5-year period from 1915 to 1919, inclusive. In 1915 and 

 again in 1918 no crop from seed from Chico, Calif., was grown. For 

 each variety the data recorded are from seed continuously grown at 

 Amarillo in comparison with that from seed grown at the other points. 

 The stands in all plats of the same variety were made comparable by 

 hand thinning each year except in 1919, which eliminated whatever 

 influence unequal stands might have had on the crop. 



The data recorded for suckers and erect heads in Dwarf milo and 

 headed stalks in the other varieties generally do not show any strik- 

 ing differences in the same year. However, in the 1916 crop, feterita 

 from the Amarillo seed is somewhat lower in the percentage of suckers 

 and considerably below the others in percentage of stalks bearing 

 heads. 



The yields of the same variety are fairly close in the same year. 

 The seed from the same source did not make the highest yield in all 

 years. 



Table XXI. — Annual and average yields off/rain sorghums grown in the environmental 

 experiments at the Amarillo Cereal Field Station during the 5-year period from 1915 to 

 1919, inclusive. 



[In the statement of yields per acre the bushel is rated at 60 pounds for kafir and at 58 pounds for other 



sorghums.] 



Annual yields per acre. 



Variety and source of seed. 



Average yields per 

 acre. 



3 years, 



1916, 1917, 



and 



1919. 



6 years, 



1915 to 



1919. 



Dwarf milo: 



Amarillo, Tex. 



Arlington, Va. 



Chico, Calif 



Feterita: 



Amarillo, Tex . 



Arlington, Va. 



Chico, Calif 



Dawn kafir: 



Amarillo, Tex . 



Arlington, Va. 



Chico, Calif . . . . 



Bushels. 

 61.7 

 65.2 



Bushels. Bushels. 



2. 8 29. 7 



2. 9 26. 9 



2. 3 22. 8 



46.9 



48.6 



53.7 

 58.3 



4.7 

 15.8 

 14.8 



5.7 

 6.2 

 5.3 



Bushels. 

 4.8 

 6.6 



18.6 

 17.2 

 16.9 



26.7 

 29.0 

 19.7 



3.1 

 4.1 



1.3 



2.0 



Bushels. 

 50.0 

 46.6 

 44.8 



27.2 

 35.1 



44.8 



26.0 

 31.0 

 37.3 



Bushels. ' Bushels. 



27.5 

 25.5 

 23.3 



16.8 

 22.7 

 25.5 



19.5 



22. 1 

 20.8 



29.8 

 29.6 



20.1 

 24.2 



22.7 

 25.3 



The annual and average acre yields recorded in Table XXI show 

 that Dwarf milo from Amarillo seed yielded highest in 1917 and 1919, 

 and from the Arlington seed in 1915, 1916, and 1918. The 3-year 

 average yield favors the home-grown seed, but the 5-year average 

 yield shows no difference between that and the seed grown at the 

 Arlington Experimental Farm. 



