GRAIN SORGHUMS IN THE TEXAS PANHANDLE. 



35 



plant, was obtained each year. The 6-inch rate is missing in 1918, 

 and the 10 to 15 inch rate was omitted in 1914. In the 4-year period, 

 which includes four rates, the average is in favor of the 8 to 9 inch 

 rate, but in the two 5-year periods and one 6-year period it favors the 

 6-inch rate. This indicates that 6 inches of row space to the plant in 

 rows spaced 7 feet apart is probably the best rate. 



COMPARATIVE YIELDS FROM 3^-FOOT AND 7-FOOT ROWS. 



Table XIX shows the annual and average acre yields of Dawn 

 kafir in 3^-foot and in 7-foot rows in the spacing experiments, so 

 that comparisons between the spacings may be easily made. 



Table XIX. — Annual and average yields of Dawn kafir 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.] 





Space 



tween 

 rows. 



Row 



space 



per 



plant. 



Annual yields per acre. 



Average yields per acre. 



Approximate 



number 



of plants per 



acre. 



1914 



1915 



Bu: 

 60.2 

 47.7 

 69.0 

 48.0 

 68.3 

 4Q 7 



1916 



1917 



Bu. 



14.8 

 17.7 

 12.2 

 21.7 



17.8 

 33.8 

 26.8 

 25.5 



1918 



Bu. 

 0.7 

 1.9 

 1.8 

 3.0 

 .7 

 1.2 

 3.3 

 3.0 



1.2 



1919 



Bu. 

 38.8 



3 

 years, 

 1915, 

 1917, 

 and 

 1919. 



•* 



years, 



1915 



to 



1918. 



5 j 5 



years, years, 



1914 1914, 



to 1915, 



1916, , 1917 



1918, 1 to 



1919. 1919. 



5 



years, 



1915 



to 



1919. 



6 



years, 



1914 



to 



1919. 



Group A, 24,000 

 plants 



Feet. 

 { f 



\ 7 

 J H 

 \ 7 

 f 3,} 

 I 7 



{ ¥ 



Inches. 

 6-7 

 2-3 

 8-10 

 4-5 



11-13 

 6 



15-19 

 8-9 



21-26 



10-15 



Bu. 



8.7 



18.5 

 25.0 

 18.7 

 23.5 



Bu. 

 1.0 

 1.7 



8.5 

 5.8 

 10.7 

 3.8 

 5.3 



6.2 



Bu. 

 37.9 



Bu. 

 19.2 

 17.3 



Bu. j Bu. 

 21.9 24.6 



Bu. 

 23.1 



Bu. 

 20.7 



Group B, 18,000 



25.4 

 37.1 

 32.3 

 31.5 

 32.8 

 27.3 

 29.7 

 23.7 



35.5 



35.6 





25.4 

 27.0 







plants 



20.3 



24.3 

 25.2 

 23.3 



23.7 



23 9 



Group C, 12,500 





plants 













Group D, 9,000 

 plants 



19.0 62.7 

 18 2 <« s 



37.8 

 37.7 

 37.3 

 30.0 



21.9 

 21.5 



24.3 

 19.5 



27.1 

 25.2 



24 1 

 22.6 



23.2 

 21 9 



Group E, 7,000 





55.5 

 40.8 





plants 



18.4 







19.5 











Group A represents a rate of 6 to 7 inches of row space to the 

 plant in rows 3^ feet apart and 2 to 3 inches where the rows are 7 

 feet apart, or an average of approximately 24,000 plants to the acre. 

 At this rate the methods are comparable in only four years, and in 

 that period the average yield is in favor of the rows 3^ feet apart. 



Group B has a stand of 8 to 10 inches in rows 3^ feet apart and 

 its equivalent in rows 7 feet apart, or approximately 18,000 plants 

 to the acre. This rate shows a small difference in the average yields 

 in favor of rows spaced 7 feet apart in the 3-year and the 5-year 

 periods for which averages are possible. 



Group C has a plant space of 11 to 13 inches in rows spaced 3§ 

 feet apart and of 6 inches in rows spaced 7 feet apart, or an average 

 of approximately 12,500 plants to the acre. These rates were obtained 

 in only five years and in that period the average yield is in favor of 

 the rows spaced 3£ feet apart. 



Group D represents a stand of 15 to 19 inches of row space to the 

 plant where the rows are spaced 3^ feet apart, and 8 to 9 inches with 



