22 



BULLETIN 33. U. S. DEPARTMENT OF AGRICULTURE. 



Table IX. — Average miscellaneous data for seven varieties of wheat grown at 

 the Dickinson substation for periods of 8 to 6 years (1907 to .1913). 



[Superior index figures indicate the number of years during which the data were obtained when this 

 number is less than the number of years in which the variety was grown.] 







t- 









Average time 





-3 



Average ac- 



o 







o 



Av 



;rage date- 





to maturity 





tual yield 

















from — 



3 



«§ 



per acre. 



IL 



C.I. 



Xo. 



Group and variety. 



o 











'3 

 A 



a 



Uj 

 03 



y 



03 -2 

 t> P. 







Headed. 



Ripe. 



.a 

 3 



03 



fci> 



.5 

 -a 



03 



a 



03 



£ 



03 



o 

 > 







fc 











Ph 



HH 



< 



<1 



o 



02 



< 





Durum: 













Days. 



Days. 



In. 





Bu. 



Cu't. 



Lbs. 



1440 



K u banka 



6 



July 



7 



Aug. 



13 



125 



37 



39 



3 3S0,000 



26.2 



21.1 



62 



1494 



Arnautka 



Fife: 



Ghirka 



5 



July 



8 



Aug. 



16 



125 



39 



^ 42 



2 390,000 



28.1 



22.7 



61 



1517 



6 



July 



6 



Aug. 



8 



120 



31 



34 



3 420,000 



23.3 



5 17.3 



60 



3022 



Rvsting 



6 



July 



13 



Aug. 



11 



123 



29 



5 35 



3 563,000 



21.6 



■>17.8 



57 



3081 



Bearded Fife 



Bluestem: 



3 



July 



2 



Aug. 



1 



121 



30 



30 



3 477,000 



13.4 



20.3 



61 



3314 



Crossbred (N. 





























Dak. No. 318) 



G 



July 



14 



Aug. 



13 



125 



30 



33 



2 550,000 



20.0 



5 16.4 



58 



3(120 



Haynes(Minn. 





























No. 169) 



5 



July 



13 



Aug. 



15 



124 



33 



36 



2 470,000 



19.8 



3 16.4 



57 



The stand, as used in Table IX, means the number of plants to 

 the acre. This is determined shortly after emergence by counting 

 the number of plants contained in a metal frame inclosing ^oVo - 

 of an acre. Four counts are made to the plat, the total actual count 

 being the number of plants on 1 J- of an acre, or, conversely, the 

 number of thousands of plants per acre. Several factors, such as 

 the size of the grain and the viability of the seed, influence the stand. 

 There seems to be no definite correlation between stand and yield 

 within the limits of 300,000 to 600,000 plants per acre. 



Spring wheat is usually headed at Dickinson by the middle of 

 July and is ripe by the middle of August. Of the varieties included 

 in Table IX, the Ghirka and Bearded Fife are the first to mature. 

 The Marquis, a beardless fife, was the earliest maturing variety 

 in 1013. This is an important factor for drought-resistant or 

 drought-escaping cereals. The durum varieties head earlier than the 

 ordinary fife and bluestem varieties, but require a longer period 

 from heading to maturity and ripen at about the same time. 



The straw yields of the bearded fife varieties are less than those 

 of the durums, but more than those of the beardless fifes and blue- 

 stems. The same statement may be made with regard to the weight 

 of grain per bushel. The average height of the spring wheats at 

 Dickinson is about 3 feet. The height of the durum varieties is 

 greater than the average, while that of the bearded fife varieties 

 is a trifle less. The average length of head is about 3 inches. The 

 heads of the durum and bearded fife varieties are usually shorter 

 than the average, while those of the fife and bluestem varieties 

 are usually longer. The head length of the varieties within each 

 group varies: for instance, the heads of the Arnautka average con- 



