GRAIN SOEGHUMS IN THE TEXAS PANHANDLE. 41 



Table XXII shows that the conditions under which the crop is 

 grown have much more effect on its composition than the source 

 from which the seed is obtained. For instance, Dwarf milo grown 

 -at the Arlington Experimental Farm, Rosslyn, Va. ; during the five 

 years from 1915 to 1919, inclusive, shows only very slight variation 

 in chemical composition from seed produced the previous year at 

 Arlington and at Amarillo. Results are available from crops grown 

 at Arlington from Chico seed in only three of the five years, and this 

 naturally causes some variation from the averages of the crops 

 grown from Arlington and Amarillo seed, but in general the composi- 

 tion is practically the same. In the same way milo grown at Amarillo 

 from seed from each of the three points is very similar in composi- 

 tion, but is lower in water content and in ash and considerably higher 

 in protein and fat than milo grown from the same seed at Arlington. 

 Milo grown at Chico from seed from the three sources shows rather 

 more variation than that grown at Arlington and Amarillo. The 

 grain grown at Chico shows a slightly higher water content than that 

 grown at Amarillo, but considerably less than that grown at Arlington. 

 The ash and protein content of the Chico milo is less than that grown 

 at Arlington and decidedly less than that grown at Amarillo. Milo 

 grown at Chico has about the same percentage of fat as that grown 

 at Amarillo and is slightly lower in fiber. 



In general, the same observations may be made with regard to 



feterita and Dawn kafir grown at the three stations. The variation 



between crops grown from the same seed at the three stations is 



greater than that between crops grown at any one of the stations 



from seed from the three sources. The moisture content of the seed 



grown at Chico is intermediate between that grown at Amarillo and 



at Arlington. The Amarillo seed is materially higher in protein in 



each case, and is also higher in fiber. The variations in ash and fat 



are not marked. 



SUMMARY. 



The data on the date of seeding, spacing, and environmental 

 experiments with grain sorghums, as presented in this bulletin, may 

 be summarized briefly as follows: 



(1) The yields are influenced by seasonal conditions to such an 

 extent that no one date of seeding is best for all years. The average 

 yield in a series of years is the one safe basis for practice. 



(2) All the varieties did not give the highest average yield from the 

 same date of seeding. Some yield better from early seeding than 

 others. 



(3) Dwarf milo produced the best average yields from sowing on 

 the normal date, about May 23; Dawn kafir from the early date, 

 May 10; and feterita and Manchu kaoliang from the late date, about 

 June 10. 



