64 BULLETIN 1301, U. S. DEPARTMENT OF AGRICULTURE 
Notes on maturity are not in any way complete, but it appears that 
on the whole, the flints are earlier than the dents. The flints are 
mostly low-growing and have a tendency to sucker freely, whereas 
the dents grow t taller and are more or less free from suckers. These 
differences affect the ease with which each group may be harvested. 
The dent varieties, as a group, are harvested readily with a corn 
binder; but the flint varieties, with the exception of some of the 
late ones, such as Mercer and Rainbow, are difficult to harvest in 
this way. 
The annual and average yields of the varieties of corn that have 
been grown from six to eight years are viven in Table 25. This list 
includes all the higher yielding of the best adapted varieties. 
The best-yielding flint varieties are Dakota White, Gehu, and 
White Ree. These are also the earliest of the flints. There is so 
little difference in the yield of these three varieties that it is impos- 
sible to state that one is superior to the others in yield of grain. 
Nine other flint varieties have been tested for periods varying “from 
one to three years. Among the later varieties which are regarded well 
farther east and south are Mercer and Rainbow, but these have not 
compared well with the earlier varieties in production of grain. 
The leading dent varieties in production of ear corn are North- 
western, Payne White, Minnesota No. 13, and Rustler. For this 
section the first two may be considered as medium-early varieties 
and the last two as medium-late varieties. The Northwestern dent 
under trial was the local-station strain described in connection with 
the rotation and tillage work. Itis perhaps one of the most depend- 
able dents for this section and has the highest average yield of any of 
the dent varieties tested. Minnesota No. 23 is one of the earliest 
dents but has not proved to be a good yielder. Of the medium-late 
varieties Minnesota No. 13 is perhaps the most popular in this sec- 
tion. It grows to more than average height, the ears are high, and 
it is practically free from suckers. 
The highest yielding variety of flint has an 8-year-average acre 
yield of 25.8 bushels cae the highest yielding variety of dent an 
average of 23.5 bushels for the same period. 
The yields of fodder or stover have not always been determined in 
these trials. The incomplete records show yields as high as 3 tons of 
field-cured fodder per acre. The highest yields of fodder generally 
have been from the flints. 
TaBLe 25.—Yields of ear corn of the varieties tested at the Northern Great Plains 
Field Station six or more years during the 8-year period, 1915-1922, inclusive 
Yields per acre (bushels) 
Group and variety | | | | Caveat eS year 
| | aver- | aver- 
| 1915 | 1916 | 1917 | 1918 4919 | 1920 | 1921 | 1922 | age, age, 
| | | | | 1917 to | 1915 to 
| 1922 1922 
re =~ — = ee — | | |- = | | ie = 
Flint: | | | | | 
IDO, MAYO Se se foo ooe | 20.0 | 36.8 0 | 38.0 | 26.8 | 23.1 | 26.7 | 35.0} 24.9 25. 8 
Geli ie ease ae oes lane ..| 16.6 | 38.0 0 | 31.8 | 24.5 | W718) | 2655) dono 22.7 23. 8 
WilniGenRe elses se seme eens aoe Wen 94 | eae 0 | 35.7 | 25.5 | 18.0 | 25.2 | 35.3 23505 | Soe 
Dent: | | | | | 
INoTEWwestenn ease seer eee se | 21.5 | 27.1 0 | 38.2 | 26.1 | 12.3 | 30.5 | 37.0 23. 2 23. 5 
Rustler’: tess aes: so eee eae 29.5 | 33803 0.) 19.7 °) 20:0 | 15.7 | 25.2 | 23.4 17.3 20. 9 
Rayne Wihiitees apes e es eee sese se | ee ON 2852) 830! 3)| SHO oO ln 20 4a | ieee 2) eee 
Minnesota None Se siaes: ie irae st |i O! 1.22.16) 2307 |) (8cTe e207 SIR Sel ee Ieee eae ee 
Mabyabaves(onres INI@s; AA eee Soe ee ee ae (@) Ta US Yh = ie | IOS 1 PAL & HS Fea Spe Seen 
