COST OF USING POWER ON WHEAT FARMS IN OREGON 9 
per cent of the total horse work. The man days per farm for this 
work amounted to 111.9. 
The forage was mainly grain hay of which wheat hay, cut before 
the grain was fully ripe, constituted the larger part. Most of this 
grain hay was cut either with headers or with reapers. The haying 
work, together with the work of hauling chaff and straw, required a 
total of 72 horse days‘and amounted to 8.2 per cent of the total horse 
work per farm. Most of the grain hay was stored in barns, but the 
straw and chaff were hauled to stacks, usually near the feed lot, and 
fed out as needed. 
Picking up and piling grain sacks and hauling grain to granary 
and to market required a total of 115.8 horse days and amounted to 
13.2 per cent of the total horse work per farm (fig. 5). An average 
of 10,398 bushels of grain per farm was hauled to granary or to 
market, of which 3,889 bushels. or 37.4 per cent, was hauled by 
motor truck. 
Fic. 4.—Spring plowing in preparation of land for summer fallow. Three 16-inch 
plows with a packer attached behind drawn by 16 horses. The acreage plowed 
with horses amounted to 24 per cent of the total acres spring plowed per farm 
Miscellaneous werk, such as hauling fuel and oil, hauling seed, and 
roustabout work amounted to an average of 9.3 horse days per farm. 
Eighteen and four-tenths per cent of the seed was hauled with 
motor trucks. 
From a review of the work done with horses and tractors it will be 
seen that for those operations where the tractor competes with horses 
as a source of motive power, such as plowing, disking before plow- 
ing, and harvesting and threshing with the combine, tractors were 
preferred. On the other hand, spike-tooth harrowing, weeding, and 
drilling was done largely with horses. The former are operations 
which require great amounts of power and which are especially 
adapted to the use of large power units, whereas the latter are the 
lighter operations which often do not provide a full load for the 
power developed by the tractor. 
16386° —26——2 
