ONE-VARIETY COTTON COMMUNITIES. 49 
strated the practical value of the one-variety plan and the impor- 
tance of extending it to other regions. Xot only supplies of good 
seed but cultural improvements and marketing problems can be 
worked out to better advantage in one-variety communities on ac- 
count of the better basis of production. More active interest and 
greater skill in the handling of the crop are developed when the at- 
tention of all the farmers of a community is directed to a single 
superior variety instead of being confused and dissipated by the 
presence of different varieties and inferior mixed stocks. Hence, 
a careful consideration of the one-variety plan may be urged upon 
those who are interested in any measures of improvement in the 
cotton industry. In view of the enormous wastes of the present 
system there should be no unnecessary delay in utilizing the varie- 
ties and other improvements that are possible and ready to be 
applied as soon as the farming public is sufficiently informed. 
LIST OF PUBLICATIONS ON COMMUNITY COTTON IMPROVEMENT. 
The following list includes publications issued by the Department 
of Agriculture and a few other papers that treat of improvement of 
the cotton industry through community organization, in order to 
utilize superior varieties and maintain pure seed supplies : 
Cotton selection on the farm by the characters of the stalks, leaves, and 
bolls. By O. F. Cook. Bureau of Plant Industry Circular No. 66. Issued 
August 13, 1910. 
Cotton improvement on a community basis. By O. F. Cook. Yearbook for 
1911, pp. 397-410. See also report of the Chief of the Bureau of Plant In- 
dustry for 1911, p. 24. 
Selection of cotton and corn seed on southern farms. By S. A. Knapp and 
J. A. Evans. Bureau of Plant Industry Document No. 747. (Farmers' Co- 
operative Demonstration Work No. "A"-67.) Issued May 11, 1912. 
Factors affecting the production of long-staple cotton. By O. F. Cook. Bureau 
of Plant Industry Circular No. 123, pp. 3-9. Issued April 26, 1913. 
Cotton problems in Louisiana. By O. F. Cook. Bureau of Plant Industry 
Circular No. 130. pp. 3-14. Issued June 21. 1913. 
The relation of cotton buying to cotton growing. By O. F. Cook. U. S. 
Dept. of Agriculture Bulletin No. 60. Issued February 16, 1914. 
Custom ginning as a factor in cotton-seed deterioration. By D. A. Saunders 
and P. V. Cardon. U. S. Dept. of Agriculture Bulletin No. 288. Issued Sep- 
tember 7. 1915. 
Community production of Durango cotton in the Imperial Valley. By 
Argyle McLachlan. U. S. Dept. of Agriculture Bulletin No. 324. Issued 
December 22. 1915. 
Community production of Egyptian cotton in the United States. By C. S. 
Scofield, T. H. Kearney. C. J. Brand, O. F. Cook, and W. T. Swingle. U. S. 
Dept. of Agriculture Bulletin No. 332. Issued January 13, 1916. 
Tests of Pima Egyptian cotton in the Salt River Valley, Arizona. By T. H. 
Kearney. U. S. Dept. of Agriculture, A. & D. R. P. Circular 1. Issued De- 
cember 6, 1916. 
