16 BULLETIN 402, U. S. DEPARTMENT OF AGRICULTURE. 
made in the fall, but some plats were recorded as having good stands. 
The causes for the failure shown by zero yields in 1909 are not appar- 
ent. The formaldehyde treatment was charged with the failure at 
the time, but winterkilling was more probably the cause. Enough 
seed was obtained from most of the varieties for resowing. The crop 
was not sufficiently large, however, to pay the cost of harvesting, 
and for that reason the yields are recorded as. zero. This year is 
included in calculating the average yields. 
TaBLeE I1X.—Annual and average yields of 17 varieties of winter wheat grown at the 
Akron Field Station, Akron, Colo., in the 8-year period, 1908 to 1915, inclusive. 
Yield per acre (bushels). 
| Average. 
Group and variety. c as eae Re 
1908 |! 1909 | 1919 |} 1911 |} 1912 | 1913 | 1914 } 1915 All Six 
| years | foro to 
grown 915 
Crimean: | 
AMibertarvedssssass- eee SOray 4 ie i i) A) ese. 1265 1 ae: 17.8 | -31512131:3 |]. 19:02 
iBeloclitia = oe 2 eee 15485102 Or POSS ee earn PPAR eB ES cick 19°S jcc 
Crimean enn ee a eee 14325 |'PQ5 25S s8 22 ee ae 2 ee S| ee eee 
On ee eee 1436 | 19.1 0 Boro | 69 ool Les e2Saan eos Onle aceaO 26. 
1D) Oe ee as 1437 | 14.6 0 BYE ey || 118383 1) BP a IE POSES | ARE 20. 2 24.3 
Op iG i 5 DOR Bees ae 36.9 | 11.5 | 32.7 | 17.0 | 39.6 | 29.0 7.8 27.8 
Sauareot Bye or pda yi ae eR 1442 | 20.6 0 27. 9-| 10. 0.) 34.3 | 16/1 || 26.6 | -27-25 20. 4 AT) 
Ae igs ate aE see ees bayeS | IBY): 83 0 29287) W422 3ieo {6 1662) 2529 |- 2922 21.6 25. 5 
harkor OA ee A207 Wiese ee Re ee ek 1053: 1 3322)) 48: 5: | 26) 1 12853 7A Yea a) eae 5 
MaTaiko losses eeece 2908) 822 ee see 2019) | Linoneods 4ahlosd a) GOs Oso 26. 4 26. 4 
ROTLOVA oat ee ee See 1539) Bosses DOE Grtstis coals cae e|ecoece | Seem | ee 2076" |< 52 
Turkeys. ee ee a atsteys [eet Haas ey ee [Ger el bs 2 P| ese ep SS = Se liars oe ees | pe nee eee 
Dee ee se te 1571 | 19.8 0 Pata || LG) | ZER Ted | 250.4 p 2851 = 2026 24.1 
DD) Oe ees See REDE Die eyes (EEE aay al |e | [eel (eee 28.8 625) |e2ouOn 25a 210) | ose ee 
Miscellaneous: 
Bite NOs yas ee SISO Mees cere | peewee me yea) | ees | BE | ere 16:71:4)- eee 
. Diehl Mediterranean..... 1395 | 10.4 0 Seat 8.94 eee 12.8 | 30.5 | 26. 4 18:0)|24 2. 
Ghirka Winter 5-222. == 1438 | 15.6 0 38. 0 |. 15289] S82. | dveor| 2450) 1 2258 21.5 26.1 
The yields in 1910 were high, due to the favorable distribution of 
precipitation. In 1911 a lack of moisture caused the lowest yields 
of any of the years for which yields are recorded. The average 
yield of all varieties of the Crimean group in 1911 was 12.7 bushels 
per acre. ; 
The year 1912 again gave high yields, the average for the Crimean 
group being 34.5 bushels per acre. This is 4 bushels more than the 
next highest yield, 30.5 bushels per acre, produced in 1910. 
_. The crops of 1914 and 1915 were ae of ordinary size. It is well 
to note that the yield of grain was not increased in proportion to the 
increased rainfall of the year 1915. This is due to unfavorable dis- 
tribution, which resulted in a lack of moisture during ripening. 
Six varieties have been tested during the 8-year period. Of these, 
Crimean (C. I. No. 1436) has given an average yield of 22 bushels per 
acre. ‘Thesecond in rank is Kharkof (C. I. No. 1583), with an average 
yield of 21.6 bushels. In 1910 two varieties of promise were intro- 
