6 FARM GRASSES OF THE UNITED STATES 
tural wealth of the country is mostly concentrated. In 
them, from 10 to 25 per cent. of the improved land is 
devoted to hay and forage crops. ‘The last group con- 
sists of the Rocky Mountain States and New York. 
and New England. In these States the grass area ex- 
ceeds 25 per cent. of the total. The large amount of 
hay grown in these two groups of States is due to 
special conditions. In the Mountain States the chief 
industry is stock-raising on the ranges, and thé hay is 
grown for winter feed. The proportion of grass to 
other crops is indeed larger here than is called for in 
properly diversified agriculture, and there is much talk 
of the need of grains for finishing off cattle. In New 
York and New England much hay is grown for market. 
Dairying is also an important industry. Unlike Iowa, 
Wisconsin, and other great dairy States in the Central 
West, where concentrated dairy feeds are largely pro- 
duced on the farm, New England finds it more advan- 
tageous to devote her lands to grass, and to buy grain 
and mill products for her cattle. 
The data concerning the hay and forage crops of 
the country are given in Vol. VI., Census of 1900, 
under the following headings: ‘‘ Wild, Salt, and Prai- 
rie Grasses,’’ ‘‘ Millet and Hungarian Grasses,”’ ‘‘ Al- 
falfa or Lucern,’’ ‘‘ Clover,’’ ‘‘ Other Tame Grasses,’’ 
‘Grains Cut Green for Hay,’’ and ‘‘ Forage Crops.’’ 
The distribution of each of these crops will be dis- 
cussed later. The data for clover relate to clover sown 
alone, and include all the varieties. When sown with 
timothy or other true grasses, clover is included under 
‘‘other tame grasses.’? Grains cut green for hay here 
includes peas as well, since, in the North, peas are 
