34 



BULLETIN 976, U. S. DEPARTMENT OF AGRICULTURE. 



section, as in the first, six plats were seeded each year, representing 

 as many different rates. The stands obtained from the same rate were 

 not the same in all years. The stands in the thick rate range from 

 about 2 to 5 inches of row space to the plant in the different years, 

 while the thinner stands in some years have a much wider range. 



The various spacings between plants in rows 7 feet apart have an 

 influence on suckering similar to those in rows 3^ feet apart, the per- 

 centage increasing as the stand decreases. In 1918 the thick stand 

 produced no suckers, but the percentage increased in the thinner rates 

 up to 26 per cent in the 15-inch stand. The percentage of suckers was 

 much higher in other years, but it usually showed the same general 

 trend between the thin and thick rates. 



The good seasons show a high percentage of stalks bearing heads, 

 but in these seasons, as hi the poor ones, the thinner plantings show a 

 higher percentage than the thicker ones. The lowest percentage in 

 all the rates was produced in 1918 and the highest in 1919. 



The total crop yields in the 7-foot rows do not run as high as in the 



corresponding spacings with the rows spaced 3^- feet apart. The 



highest total crop yield, 8,500 pounds, in this 6-year period, was made 



by the 3-inch spacing in 1915, and the lowest by the 6-inch spacing in 



1918. The high grain yields do not in all cases follow the high total 



crop yields. In 1915 the spacing that ranked second in total crop 



yield had first place in grain yield. In 1916 and 1918 the spacings 



given third place in total crop yield took first place in grain yields. 



The grain yields were higher from all rates in 1915 than in any other 



year. 



Table XVIII. — Annual and average yields of Dawn kafir in rows spaced 7 feet apart in 

 the spacing experiments at the Amarillo Cereal Field Station during the 6-year period 

 from 1914 to 1919, inclusive. 



[In the statement of yields per acre the bushel is rated at 60 pounds.] 





Annual yields per acre. 



Average yields per acre. 



Row space per 

 plant. 



1914 



1915 



1916 



1917 



1918 



1919 



4 years, 

 1915 to 

 1918. 



5 Years, 

 1914 to 

 1916, 

 1918, 

 1919. 



5 years, 6 years, 

 1915 to i 1914 to 

 1919. j 1919. 





Bush. 



Bush. 

 47.7 

 48.0 

 49.7 

 43.8 

 40.8 



Bush. 

 1.7 

 8.5 

 10.7 

 5.3 

 6.2 



Bush. 

 17.7 

 21.7 



33.8 

 25.5 



Bush. 

 1.9 

 3.0 

 1.2 

 3.0 

 1.2 



Bush. 



37.1 

 31.5 

 27.3 

 23.7 



Bush. 

 17.3 

 20.3 



21.5 

 18.4 



Bush. 



Bush. 



Bush. 





25.0 

 23. 5 

 18.2 



24.3 

 23.3 

 19.5 



23.7 



23.9 









22.6 

 19.5 



21.9 













Table XVIII shows the annual and average acre yields in bushels 

 of 60 pounds each for five rates in part or all of the 6-year period from 

 1914 to 1919, inclusive. The thick rate had a stand ranging from 2 

 to 3 inches of row space to the plant in the four years for which data 

 are shown. The second rate, with 4 to 5 inches of row space to the 



