CEREAL EXPERIMENTS IN MARYLAND AND VIRGINIA. 39 



Rustproof selection. The Bicknell was injured more than either 

 I he 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 

 ninety usually contain mixtures similar to the Culberson. It grows 

 sailer than the Red Rustproof and has larger, more spreading panicles 

 md much smaller kernels. The kernels are decidedly variable in 

 color, ranging from white through brown to grayish black. The 

 drains which bear brown or black kernels do not differ otherwise in 

 ippearance from the white-kerneled strains. In commercial stocks 

 yi the Culberson at least 90 per cent of the kernels are usually white. 

 Hie 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 

 ncluded in the tests at College Park. This variety has been very 

 consistent in yield, ranging from 40.9 to 54.37 bushels during the 

 5even years, with an average of 46.3 bushels. This average yield is 

 ower 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. 

 Fhe 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 

 pield of 37.14 bushels in the four years from 1911 to 1914. The 

 iverage yield of the Culberson at Arlington Farm was from 2 to 3 

 Dushels lower than that of the various strains of the Winter Turf, 

 ibout 6^- bushels lower than the best Red Rustproof, and 2 bushels 

 .ower than the best selection from the Bicknell. The average weight 

 Der 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 

 ? or four years at Arlington Farm. These are C. I. Nos. 273-19 and 

 351. The former is a pure line with brown kernels, which otherwise 

 ls not distinguishable in appearance from the original stock. It has 

 sxceeded the unselected variety in average yield by nearly 4 bushels. 



2. I. No. 651 is a selection (No. 5) which was made in 1908 by Prof. 



3. A. Mooers at the Tennessee Agricultural Experiment Station. It 

 matures about three days earlier than tha 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 



