EXPERIMENTS WITH ELAX OX BREAKING. 9 
progressed to the point where the results warrant presentation. 
However, data on certain varieties and naw introductions grown in 
the nursery for three years are included, in order to show the pos- 
sible value of varieties imported from various foreign countries for 
growing in the region under discussion. 
SIZE AND ARRANGEMENT OF PLATS AND ROWS. 
In 1914 all varietal and cultural experiments were seeded in 
twentieth-acre plats and the series duplicated (fig. 1). In 1915 the 
varieties were seeded in plats of one fifty-fifth of an acre each, and 
these were replicated five times, making five plats of each variety. 
Fig. 1. — Panoramic view of plat experiments with flax at Mandan, N. Dak., in 1914. The experiments 
in 1915 and 1916 were on fields in the left and right background, respectively, under similar conditions. 
The cultural experiments were continued on the 1914 basis In 
1916 all plats were one fifty-fifth of an acre in size. The varieties 
were replicated five times and the cultural experiments thrice. In 
1915 and 1916 numerous varieties were grown in single fifty-fifth 
acre plats to increase the seed stocks. 
All plats are 8 rods long. The fifty-fifth-acre plats are one drill 
width wide, or 5.5 feet from outside row to outside row. The alleys 
in 1914 and 1915 were 30 inches wide. In 1916 these were reduced 
to 18 inches, in order to overcome some of the border effect previ- 
ously noted. Grain does not lodge as badly along the borders of 
plats when the narrower alleys are used, and less chance of admixture 
in harvesting results. Between the replications, however, an addi- 
185529°— 20 2 
