THE BLUE-GRASSES 93 
Region of Kentucky. According to Bulletin 19 of the 
Bureau of Plant Industry, United States Department 
of Agriculture, the principal centre for the commercial 
production of blue-grass seed is Bourbon, Fayette, and 
Clark counties, Kentucky, in the heart of the Blue- 
Grass Region. Considerable seed is harvested in the 
adjoining counties of Scott, Montgomery, Woodford, 
Franklin, and Jessamine. ‘‘ Most of the seed is secured 
within a radius of twenty-five miles from the centre of 
a triangle formed by lines connecting the cities of 
Lexington, Paris, and Winchester.’’ In recent years 
considerable blue-grass seed has been harvested in 
southern Iowa and northern Missouri. Small quan- 
tities are also harvested in other States. 
Distribution.— Fig. 19 shows approximately the dis- 
tribution of blue-grass in this country. By referring 
to Fig. 17, it will be seen that blue-grass agrees very 
closely with timothy in its distribution. ‘These two 
grasses and red clover, which has nearly the same 
distribution, undoubtedly account for the high de- 
velopment of livestock farming in the northeastern 
quarter of the United States. 
Each dot on the map shown in Fig. 19 represents a 
correspondent who, in answer to a circular letter, re- 
ported blue-grass as an important grass in his locality. 
The census returns give no clue to the area devoted to 
blue-grass. What little hay is cut from it is included 
in the ‘‘other tame grasses’’ of the census reports. 
The yield of blue-grass hay seldom exceeds half a ton 
per acre, except in very restricted localities on the 
north Pacific Coast, and it is therefore seldom cut for 
hay. 
