THE CLYDE SERIES OF SOILS. 41 
crop prevails in the more northern latitudes where dairying is ex- 
tensively conducted. 
Oats are the important small-grain crop upon the Clyde silty clay 
loam. This crop usually follows corn in the rotation and under 
conditions of favorable season gives yields ranging from 40 to 60 
bushels per acre. There is a tendency toward the lodging of the 
main, especially upon areas where drainage is not complete. The 
}deld is thus somewhat reduced. 
Wheat is only grown to a limited extent on the Clyde silty clay 
loam and with extremely variable yields, which range from 14 to 25 
bushels per acre. 
The Clyde silty clay loam is an excellent soil for grass production, 
and large areas are seeded to mixed timothy and clover or to clover 
alone. The seeding is either made in the spring with the oat crop 
or the timothy is sown in the fall with the wheat and the clover is 
harrowed in during the succeeding spring. Yields of hay range 
from 1J to 2^ tons per acre, probably averaging about If tons. Some 
areas of the Clyde silty clay loam where drainage has only been par- 
tially established support a heavy growth of marsh grasses, which 
are either cut for hay or are utilized as pasturage. The yields of 
marsh hay range from 1 to 2 tons per acre. 
Special crops are grown only to a limited extent on the Clyde silty 
clay loam. In some areas in Wisconsin sugar beets are grown, giv- 
ing yields of 12 to 18 tons per acre. In that State, also, both cab- 
bage and onions are produced upon this soil, the former giving yields 
of 12 to 15 tons and the latter 300 to 500 bushels per acre. Irish 
potatoes are grown to a limited extent, producing yields of 100 to 
300 bushels per acre. The potatoes are usually not of first quality. 
The most common rotation upon the Clyde silty clay loam consists 
of corn planted for two or more years in succession and followed by 
oats. Seeding to mixed grass and clover is made with the oat crop. 
Hay is cut for one or two years and the lands may be pastured for an 
additional year. The rotation then returns to corn. The value of the 
Clyde silty clay loam for corn production is so generally recognized 
that there is a constant tendency to plant corn as often as is pos- 
sible. In consequence the greatest acreage in grain is usually de- 
voted to this crop. It is probably only exceeded, if at all, by the 
acreage given to hay. 
Very little has been done in the line of fertilizing the Clyde silty 
clay loam, the majority of farmers depending upon the inherent fer- 
tility of the soil for the maintenance of crop yields. Stable manure 
is used probably more extensively than any other material, being 
applied to the second cr third crop of Corn. In some localities a 
small amount of commercial fertilizer is applied with the small- 
grain crop. 
