June i6,1923 
Factors Affecting Nitrogen Content of Wheat 
943 
per cent increase in nitrogen over that grown in rows 6 inches apart. 
The same comparison with spring wheat shows a 10.8 per cent increase. 
The amount of nitrogen in the spring wheat containing the lowest per¬ 
centage of nitrogen is 6.95 per cent greater than the corresponding fall 
wheat. Comparing the highest percentages in spring and fall wheats, 
it is found that the amount in the spring wheat is greater by 4.1 per cent. 
From the results in Table I it will be noted that the nitrogen content 
of the wheat was increased by increasing the distance between the rows. 
This is more noticeable in the fall than in the spring seeding. Omitting 
the rows of 6 and 9 inch seeding, the percentage of nitrogen in the fall 
and spring is only slightly in favor of the latter. Owing to the fact that 
the extremes of variation in nitrogen are not as marked in the spring as 
in the fall seeding, it is of interest to note that the fall-sown wheat shows 
a slightly higher nitrogen content for the wheat grown in the rows next 
to the end than in the middle rows, with the exception of that grown 18 
inches apart, where there is no difference observed. The spring wheat 
shows higher results for nitrogen in the middle rows than it does for those 
next the end. 
EFFECT OF VARYING AMOUNTS OF WATER AND WIDTH OF ROWS ON NITROGEN CONTENT 
In a subsequent experiment, a study of the influence of varying 
amounts of water on the nitrogen content of wheat was made. The 
field was divided into two series of plots, and two varieties of wheat 
were grown on them. The rows were sown 6, 9, 12, 15, and 18 inches 
apart. The amount of water used in the experiment ranged from 8.78 
inches rainfall to 12, 16, and 20 inches. The land was cultivated at 
various times during the growing period in order to remove weeds and 
maintain a mulch. The average results for nitrogen content of the 
wheat are recorded in Table II. 
Table II .—Average percentage of nitrogen in wheat grown on cultivated plots receiving 
varying amounts of water 
Variety. 
Distance. 
Plot 1,8.78 
inches of 
water.* 
Plot 11,12 
inches of 
water. 
Plot III, 16 
inches of 
water. 
Plot IV, 20 
inches of 
water. 
Inches. 
6 
2.37 
2. 36 
2. 23 
2. 22 
, 
9 
2. 13 
2. 13 
2. 15 
2. 03 
Sonora. 
< 12 
2. 01 
2. 21 
2. 21 
2. 17 
15 
2. 26 
2. 21 
2. 12 
2. 30 
18 
2. 53 
2. 46 
2.31 
2. 48 
Average. 
2. 26 
2, 27 
2. 20 
2. 24 
6 
2. 21 
2. 13 
2. 29 
2. 26 
9 
2.03 
I. 88 
I. 88 
2. 12 
Hybrid 143.. 
12 
2. 03 
2. 06 
2. 04 
2. 16 
15 
2. 02 
2.39 
I. 89 
2. 08 
18 
2. 17 
2. 42 
2. 20 
2. 30 
Average. 
2. 09 
2. 18 
2. 06 
2. 18 
* Total precipitation at Grandview in 1914 was 8.78 inches. 
