2 BULLETIN 698, U. S. DEPARTMENT OF AGRICULTURE. 
usual in bulletins of this kind; hence the large space allotted to such 
data and their discussion in the present bulletin. It accounts also 
for the inclusion in the tables of more agronomic data than often is 
given in a presentation of the results of varietal experiments. 
The Office of Cereal Investigations began its experiments with 
these crops in the Panhandle in 1904. These experiments were 
conducted for three years at Channing, Tex., on the X I T Ranch. 
In 1906, work was begun at Amarillo, Tex., where it is still in progress. 
Plat experiments were first developed on a large scale in 1908. This 
bulletin presents the results obtained in the 9-year period from 1908 
to 1916, inclusive. 
The experimental data include only the results of varietal experi- 
ments. A report of the experiments on spacing or rate of seeding 
and on date of seeding will be reserved for later publication. Among 
the agronomic data shown are the row space per plant and per stalk, 
the duration of the various stages of the growing period, the pro- 
duction of suckers, the percentage of erect heads in the milos, the 
height of the plants, and the yield in bushels per acre. For certain 
varieties and in certain years there are shown also the percentages, 
by weight, of heads in the total crop and of seed in the total crop and 
in the heads. | 
The data obtained have been used as a basis for the statements 
made in numerous popular and scientific publications, in which, 
however, none of the detailed plat data were published. A brief 
summary of the experimental results was given by Ross and Leidigh 
in the bulletin cited. 
THE PANHANDLE. 
LOCATION. 
The Panhandle strictly is that part of northwestern Texas which 
extends northward from the main body of the State. In common 
practice, however, this term is applied to a much larger portion of 
iBall, C. R. Three much-misrepresented sorghums. U.S. Dept. Agr., Bur. Plant Indus. Cir. 50, 14 p., 
2 fig. 1910. 2 
Better grain-sorghum crops. U.S. Dept. Agr., Farmers’ Bul. 448, 36 p., 13 fig. 1911. 
The importance and improvement of the grain sorghums. U.S. Dept. Agr., Bur. Plant Indus, 
Bul. 203, 45 p., 13 fig. 1911. 
The kaoliangs: A new group of grain sorghums. U.S. Dept. Agr., Bur. Plant Indus. Bul. 253, 
64 p., 15 fig., 1 pl. 1913. 
The grain sorghums: Immigrant crops that have made good. U.S. Dept. Agr. Yearbook fo; 
1913, p. 221-238, fig. 5-12, pl. 29-35. 1914. 
and Leidigh, A. H. Milo asadry-land grain crop. U.S. Dept. Agr., Farmers’ Bul. 322, 23 p., 9 fig. 
1908. 
Ross, J. F. Cereal crops in the Panhandle of Texas. U.S. Dept. Agr., Farmers’ Bul. 738, 16 p., 5 fig. 
1916. ° 
and Leidigh, A. H. Cereal experiments in the Texas Panhandle. U.S. Dept. Agr., Bur. Plant 
Indus. Bul. 283, 79 p., 13 fig. 1913. 
Rothgeb, B. E. Shallu, or ‘‘Egyptian wheat”: A late-maturing variety of sorghum. U. S. Dept. 
Agr., Farmers’ Bul. 827, 8 p., 2 fig. 1917. 
Vinall, H. N., and Ball, C. R. Feterita, a new variety of sorghum. Jn U.S. Dept. Agr., Bur. Plant 
Indus. Cir. 122, p. 25-32. 1913. 
and Rothgeb, B. E. Kafirasagrain crop. U.S. Dept. Agr., Farmers’ Bul. 552,19 p., 8 fig. 1913. _ 
