GEAIISr-SORGHUM EXPERIMENTS IN THE PANHANDLE OF TEXAS. 57 



The stands obtained vary somewhat with the conditions at sowing 

 time. Either a cold, wet spring or an extra dry soil may reduce 

 germination and consequent stand. The distance between plants 

 in the BlackhuU kafir varied from about 8 inches in 1911 and 1913 

 to 9, 10, and 12 inches in all the other years except 1910, when dry 

 soil reduced germination and so doubled the average plant space. 



The average stalk space is governed by conditions occurring 

 during the vegetative period and determining the formation of 

 suckers. In general, about one-third of the total stalks are suckers, 

 making a proportion of 2 main stalks to 1 sucker. In 1909 the 

 spring drought reduced the percentage to about 14, while m 1910 the 

 May rains combined with thin stand induced vegetative growth 

 until half the stalks were suckers. Both these were j^ears of drought 

 which reduced the yields ahnost to the vanishuig point. It will be 

 noted that in the dry year, 1912, when the spring rains were suf- 

 ficient to produce 44 per cent of suckers, only 25 per cent of all 

 stalks were able to produce heads. 



Table XX. — Annual and average yields of standard BlackhuU kafir, Sunrise kafir, 

 Dawn {dmarf) kafir, and White kafir grown at the Amarillo Cereal Field Station during 

 periods of varying length in the nine years from 1908 to 1916, inclusive. 



[In the statement of 3delds per acre the bushel is rated at 60 pounds.] 





Annual jields (bushels). 



Average yields. 



Variety and 

 C. I. No. 



1908 



1909 



1910 



1911 



1912 



1913 



1914 



1915 



1916 



4 



years, 



1910 



to 



1913. 



6 



years, 



1908 



to 



1913. 



8 



years, 



1909 



to 



1916. 



9 years, 

 1908 to 1916. 



Standard: 

 71 



42.2 



3.5 



1.0 

 1.4 

 5.5 

 4.0 



26.5 

 16.9 

 19.0 

 20.2 



4.7 

 4.6 

 9.2 

 4.4 





 

 

 



14.0 



64.0 







Bus. 

 8.1 

 5.7 



8.4 

 7.2 



Bus. 

 13.0 



Bus. 

 14.2 



Bus. 

 17.3 



Civt. 

 10.4 



185 





204 



205 



31.4 

 28.6 

 27.2 

 32.6 

 34.2 



10.9 

 5.6 



10.7 



38.3 







12.7 

 10.5 



11.7 



13.9 



8.3 



206 













207 



210 



6.3 

 4.3 



4.4 

 1.6 

 2.1 

 1.5 

 2.6 

 4.8 



11.4 

 18.6 

 11.7 

 12.4 

 9.5 

 20.6 



4.5 

 3.1 

 2.7 

 3.8 

 2.6 

 4.6 





 

 

 

 

 



io. 6 35. 7 







5.1 

 5.8 

 4.1 

 4.4 

 3.7 

 7.5 



9.9 

 10.3 



9.0 



11.7 



7.0 



242 













3.30 

















333 41.7 



4.2 

 10.7 







10.1 

 13.0 









335 



336 



37.0 

 27.2 

 38.3 

 30.7 

 34.6 

 33.3 



11. 3 62. 7 







14.3 



16.9 



10.1 



337 



338 



7.7 

 5.2 

 3.9 

 7.0 



3.5 

 2.6 

 2.5 

 2.5 

 4.3. 



7.6 



o9.3 



10.1 



8.8 



21.0 

 23.6 

 21.4 

 23.9 

 24.2 



21.4 



a34.9 



26.3 

 23.7 



4.7 

 4.3 

 2.3 

 6.8 

 3.2 



8.0 



o9.6 



16.5 

 13.5 





 

 

 

 













 



9.3 64.0 







7.3 

 7.6 

 6.6 

 8.3 

 7.9 



9.3 



13.5 



13.2 

 11.5 



12.5 

 11.1 

 10.8 

 12.3 



13.8 



16.5 



9.9 



339........ 













341 



355 



5. 3 46. 7 







11.5 



13.9 





Sunrise: 

 472 





10.8 

 14.4 

 8.7 



10. 4 ."^6 



9.3 

 3.7 



16.2 



15.4 

 17.5 







Dawn: 



340 



White: 

 342 



29.0 



14.7 



14.7 

 14.3 



53.3 



18.8 



11.3 



370 





37.3 



4.0 

























a Average yield from three plats. 



A study of the annual and average acre yields, as given in Table 

 XX, is very interesting in the light of the summary of chmatic 

 conditions given previously. In two years, 1913 and 1916, abso- 

 lutely no yields of grain were obtained. In three years the average 



