16 Nebraska Agricultural Exp. Station, Research Bui. 13 
alternating single-row plats and alternating five-row nur- 
sery plats, 16 feet in length. 
Wheat — Table 1 shows the results with the wheat rate- 
of-planting tests. 
When grown in single rows in 1913, the thin rate yielded 
68 per cent as much as the thick rate, while in five-row 
blocks the thin rate yielded 90 per cent as much as the thick 
rate. Competition in rows with a thicker rate of planting 
caused the thin rate to yield relatively 24.4 per cent too low. 
(This percentage efl^'ect of competition is determined by 
dividing the difference between 68 per cent and 90 per cent, 
or 22, by 90.) 
In 1914 the thin rate in rows yielded 35 per cent as much 
as the thick rate, while in the center three rows of five-row 
plats it yielded 81 per cent as much as the thick rate. Due 
to competition, the thin rate yielded 56.8 per cent too low. If 
the two outside rows are averaged into the block yield, the 
Fig. 2 — Method of planting nursery small grain plats with a special 
nursery drill. The drill can be rapidly adjusted to plant each row 
at a given rate, independently of the other rows 
