CEREAL EXPERIMENTS IN MARYLAND AND VIRGINIA. 39 
Rustproof selection. The Bicknell was injured more than either 
the Winter Turf or Culberson by the severe cold in January, 1912. 
There is little difference in the appearance of the original variety and 
of the pure-line selections from it which have been grown at Arlington 
Farm, but in a 4-year test C. I. No. 206-3 has averaged 5.77 bushels 
and C. I. No. 206-7 4.35 bushels to the acre more than the unselected 
stock of C. I. No. 206. 
Culberson. — The Culberson oat is supposed to have originated as a 
mass selection from the Red Rustproof, as commercial stocks of that 
variety usually contain mixtures similar to the Culberson. It grows 
taller than the Red Rustproof and has larger, more spreading panicles 
and much smaller kernels. The kernels are decidedly variable in 
color, ranging from white through brown to grayish black. The 
strains which bear brown or black kernels do not differ otherwise in 
appearance from the white-kerneled strains. In commercial stocks 
of the Culberson at least 90 per cent of the kernels are usually white. 
The Culberson matures 2 or 3 days later than the Bicknell and Red 
Rustproof and about 10 days earlier than Winter Turf. 
Only the original stock of the Culberson, C. I. No. 273, has been 
included in the tests at College Park. This variety has been very 
consistent in yield, ranging from 40.9 to 54.37 bushels during the 
seven years, with an average of 46.3 bushels. This average yield is 
lower than that of the Winter Turf and is also lower than that of the 
Bicknell for the six years during which that variety has been grown. 
The yield of the Culberson was considerably higher than that of the 
Red Rustproof for the five years from 1908 to 1912. At Arlington 
Farm the original stock of the Culberson has produced an average 
yield of 37.14 bushels in the four years from 1911 to 1914. The 
average yield of the Culberson at Arlington Farm was from 2 to 3 
bushels lower than that of the various strains of the Winter Turf, 
about 6^ bushels lower than the best Red Rustproof, and 2 bushels 
lower than the best selection from the Bicknell. The average weight 
per bushel of the Culberson at Arlington Farm for the four years was 
33 pounds, which is higher than that of any other variety except the 
Bicknell. 
Two selections from the Culberson, C. I. No. 273, have been grown 
for four years at Arlington Farm. These are C. I. Nos. 273-19 and 
651. The former is a pure line with brown kernels, which otherwise 
is not distinguishable in appearance from the original stock. It has 
exceeded the unselected variety in average yield by nearly 4 bushels. 
C. I. No. 651 is a selection (No. 5) which was made in 1908 by Prof. 
C. A. Mooers at the Tennessee Agricultural Experiment Station. It 
matures about three days earlier than the original Culberson, produces 
less straw, and has brownish black kernels. It is apparently less 
hardy than the original stock, as it winterkilled much more in the 
