GRAIN SORGHUMS IN THE TEXAS PANHANDLE. 



29 



four years, 1915, 1916, 1917, and 1919, which include two good and 

 two poor seasons, the average is slightly in favor of the 6-inch rate. 

 The 5-year period, 1914 to 1918, which includes one fair, one good, 

 and three poor seasons, shows the higher yields from the thin rates. 

 The 6-year period adds another good season to the 5-year period, 

 but does not materially change the results, which indicate that in 

 rows spaced 7 feet apart, somewhere between 6 and 12 inches of row 

 space per plant for Dwarf milo is the surest rate under Amarillo 

 conditions. 



Table XIII. — Annual and average yields of Dwarf milo 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 58 pounds.] 



Row space per 

 plant. 



2 to 3 inches. 

 4 to 4£ inches 



6 inches 



8 to 12 inches 



Annual yields per acre. 



Bush. 

 32.2 

 27.4 

 32.2 

 35.5 



Bush. 

 56.4 

 60.7 

 60.7 

 53.1 



1916 



Bush. 

 9.0 

 6.9 

 15.5 

 27.5 



Bush. 

 27.6 

 31.9 

 35.5 

 32.6 



Bush. 



4.0 



12.1 



4.0 



4.7 



Bush. 

 46.9 



27.8 



Average yields per acre. 



4 years, 

 1914 to 

 1917. 



Bush. 

 31.3 

 31.7 

 36.0 

 37.2 



4 years, 

 1915, 

 1916, 

 1917, 

 and 

 1919. 



Bush. 

 35.0 

 31.8 

 40.2 

 39.8 



5 years, 

 1914 to 

 1918. 



Bush. 

 25.8 

 27.8 

 29.6 

 30.7 



6 years, 



1914 to 



1919. 



Bush. 

 29.4 

 27.8 

 32.8 

 33.2 



COMPARATIVE YIELDS FROM 3J-POOT AND 7-EOOT ROWS. 



Table XIV shows the annual and average acre yields of Dwarf 

 milo in the spacing experiments, arranged so that comparisons may 

 be made easily between the different methods. Four different rates 

 are represented, and these are arranged in four groups, each containing 

 the yields from rows spaced 3^ and 7 feet apart, but having the 

 same number of plants to the acre. The data shown are the distance 

 between the rows in feet, the row space between plants in inches, 

 and the annual and average acre yields for each spacing. 



Group A contains the data for the thick rate, with an average of 

 approximately one plant to 6^ inches of row space in rows 3J feet 

 apart, and of one plant to each 3 inches where the rows were 7 feet 

 apart, or about 24,000 plants to the acre. The highest yield, 67.2 

 bushels, from this rate was made in 1915, with the rows spaced 3^ 

 feet apart. This method also made the lowest yield, 1.7 bushels, 

 in 1918, but it has given the highest average in the 4-year, 5-year, 

 and 6-year periods. 



Group B represents an average stand of one plant to 9^ inches of 

 row space where the rows are 3| feet apart, and 4.3 inches where the 

 rows are 7 feet apart, or approximately 16,000 plants to the acre. 

 This rate occurs in only five years where the rows are spaced 3^ 



