GRAIN SORGHUMS IN" THE TEXAS PANHANDLE. 



21 



Table VIII. — Yields and other agronomic data in date-of-seeding experiments with 

 Manchu kaoliang at the Amarillo Cereal Field Station, each year, during the 6-year 

 ■period from 1914 to 1919, inclusive.- 



[In the statement of yields per acre the bushel is rated at 58 pounds.] 



Year and time 



Row space. 



Length of growing 

 period. 



Suck- 

 ers. 



Head- 

 ed. 



Height 



of 

 plants. 



Grain 



in 

 crop. 



Yields per acre. 



of seeding. 



Plants. 



Stalks. 



Vege- 

 tative. 



Fruit- 

 ing. 



Total. 



Total 

 crop. 



Grain. 



1914: 



Early 



Normal 



Late 



1915: 



Early 



Inches. 

 7.6 

 6.5 

 6.8 



5.1 

 4.0 



4.2 



5.8 



25.5 



9.9 



20.8 

 12.6 

 44.1 



18.0 

 5.8 

 10.7 



32.6 

 127.7 

 13.2 



Inches. 

 7.3 

 5.1 

 6.6 



4.4 

 3.8 

 3.9 



5.2 

 17.7 

 7.6 



9.6 



9.2 



20.8 



15.6 

 5.4 

 9.7 



13.6 



48.9 



9.1 



Days. 



68 

 60 



57 



71 



67 



58 



76 

 70 

 64 



83 

 83 



74 



91 



74 

 68 



73 

 69 

 56 



Days. 

 21 

 20 

 30 



42 

 36 



48 



20 

 27 

 39 



16 



21 

 26 



32 

 20 

 23 



31 



28 

 26 



Days. 

 89 

 80 

 87 



113 

 103 

 106 



96 

 97 

 103 



99 

 104 

 104 



123 

 94 

 91 



104 

 97 

 82 



P.ct. 



4.8 



21.9 



3.4 



14.0 

 4.3 

 7.1 



9.8 

 30.8 

 23.4 



54.0 



27.4 

 52.8 



13.3 

 6.7 



8.8 



58.3 

 61.7 

 31.8 



P.ct. 

 95.2 

 97.5 

 97.8 



96.3 

 92.9 

 95.6 



43.3 



86.2 

 80.7 



81.8 



84.5 

 89.2 



78.5 

 68.2 



78.7 



100 

 100 

 100 



Feet. 

 5.8 

 5.3 

 5.0 



6.0 

 6.5 



5.8 



3.8 

 4.0 

 3.5 



5.3 

 4.8 

 5.3 



4.0 

 3.8 



4.5 



5.3 

 5.5 

 5.5 



P.ct. 

 37.5 

 35. 1 

 35.6 



27.9 



Lbs. 

 3,150 

 3,300 

 4,300 



8,090 



Lbs. 



1,180 

 1,160 

 1,530 



2,260 

 2,700 

 2,870 



260 

 380 

 200 



890 

 140 

 500 



150 

 180 

 310 



870 



400 



1,600 



Bush. 

 20.3 

 20.0 

 26.4 



38.9 

 46.6 



Late 



1916: 



Early 



Normal 



Late 



1917: 



Early 



Normal 



Late 



1918: 



Early 



Normal 



Late 



1919: 



Early 



Normal 



Late 



36.7 



37.1 

 35.1 

 20.6 



15.5 



5.4 



21.0 



21.4 

 25.0 

 25.0 



29.8 

 37.0 

 43.5 



7,810 



700 



1,080 



970 



3,140 



2,080 

 1,580 



700 



720 



1,240 



2,920 

 1,080 

 3,860 



49.5 



4.5 

 6.6 

 3.4 



15.3 

 2.4 

 8.6 



2.6 

 3.1 

 5.3 



15.0 

 6.9 

 27.6 



The average number of suckers produced by Manchu kaoliang is 

 not as large as in Dwarf milo, feterita, or Dawn kafir. On the half 

 of the plats used in this experiment on which good stands were 

 obtained, the suckers did not exceed 14 per cent in any one plat. 

 In other plats with thin stands larger percentages of suckers were 

 produced. 



In the favorable seasons of 1914, 1915, and 1919 more than 92 

 per cent of the stalks in each plat produced heads. A much lower 

 percentage was produced in the less favorable seasons, reaching a 

 minimum of 43.3 per cent in the early seeding in 1916. 



The height of the plants ranged from 3| feet in the late seeding in 

 1916 to 6^ feet in the normal seeding in 1915. The normal seeding 

 produced the tallest and the late seeding the shortest plants during 

 the 6-year period. 



The heaviest total crop yield, 8,090 pounds, was made by the 

 early seeding in 1915, and the lightest, 700 pounds, was made- by 

 the same seeding in both 1916 and 1918. A study of the averages 

 is necessary to determine the best date of seeding. These are pre- 

 sented in figure 9 and Table IX. 



COMPARATIVE YIELDS IN DATE-OF-SEEDING EXPERIMENTS. 



Table IX and figures 6 to 9 show the annual and average acre- 

 yields from the early, normal, and late seedings of the four varieties 

 of grain sorghums used in the date-of-seeding experiments. 



52686°— 21— Bull. 976—4 



