12 BULLETIN' 1074, U. S. DEPARTMENT OF AGRICULTURE. 



greatest, 3,985, at the Oregon Agricultural Experiment Station, 

 Corvallis, Oreg. At these western points growing conditions were 

 much better for classification purposes than at eastern points. The 

 absence of summer rains in the Western States is the principal reason 

 for this, as plant characters and colors are more distinctly developed. 

 At Chico, Calif., and Corvallis, Oreg., there was the added advantage 

 of being able to sow both winter and spring wheats in the fall with- 

 out danger of losing the spring forms. At Moro, Oreg., spring 

 wheats sometimes survived from fall sowing also. At the latter 

 point much valuable information was obtained from spring sowing 

 of wheats having a winter habit. These studies were found to be 

 necessary to determine accurately the true plant habit of some 

 varieties. 



The classification nurseries were sown in short rows, usually not 

 exceeding 5 feet in length and a foot or 18 inches apart. At the sta- 

 tions where all varieties were sown both in fall and spring, each 

 variety was sown in the spring on one end of the row sown in the 

 fall. Plate I shows portions of the classification nursery at Cor- 

 vallis, Oreg., in 1919. Figure A of Plate I shows spring wheat fall 

 sown and spring sown, the fall-sown portion being on the right and 

 the spring-sown portion on the left. Figure B of the same plate 

 shows winter wheat spring sown and fall sown in the same manner. 



ASSISTANCE RECEIVED. 



To obtain samples of the different wheat varieties was the first 

 important task. This was accomplished with the assistance of many 

 individuals and institutions. 5 



The classification nurseries at the various stations usually were 

 sown by local representatives. 6 The local men also took notes on 



B The writers have obtained samples of seed and cooperation in other ways from officers 

 of the divisions of grain standardization and grain supervision, Bureau of Markets, of the 

 U. S. Department of Agriculture. Samples also have been obtained from most of the 

 State agricultural experiment stations in the United States and the Dominion Department 

 of Agriculture in Canada, and the writers wish here to express thanks to the officers of 

 these many institutions who have so kindly assisted in this work. 



6 The writers wish to acknowledge gratefully the cooperation of field men of the Office 

 of Cereal Investigations. To Mr. D. E. Stephens, superintendent of the Sherman County 

 branch station, at Moro, Oreg., and to Mr. V. H. Florell, assistant agronomist, in charge 

 of the cereal investigations at the Plant-Introduction Garden, Chico, Calif., special credit 

 is due and is here gladly given. Other station men who have assisted in these studies 

 are Mr. F. J. Schneiderhan, formerly scientific assistant, in charge of the cereal-breeding 

 nursery at Moro, Oreg. ; Mr. L. C. Aicher, superintendent of the Aberdeen substation, 

 Aberdeen, Idaho ; Mr. J. W. Jones, formerly superintendent of the Nephi substation, 

 Nephi, Utah ; Mr. N. C. Donaldson, formerly scientific assistant, in charge of the cereal 

 experiments at the Judith Basin substation, Moccasin, Mont. ; Mr. George A. McMurdo, 

 formerly assistant, in charge of the cereal investigations at the Akron Field Station, 

 Akron, Colo. ; Mr. F. R. Babcock, formerly scientific assistant, in charge of the cereal 

 studies at the Williston substation, Williston, N. Dak. ; Mr. Ralph W. Smith; assistant 

 agronomist, in charge of the cereal experiments at the Dickinson substation, Dickinson, 

 N. Dak. ; Mr. J. H. Parker, formerly scientific assistant, in charge of the breeding for rust 

 resistance in cereals at the University Farm, St. Paul, Minn. ; Mr. Louis Wermilskerchen, 



