ATMOSPHERIC-NITROGEN FERTILIZERS. 
17 
The yields of oats are no doubt misleading, since cyanamid is the 
only one of the fertilizers which shows an increased yield with lime, 
the very reverse of what was obtained with rye. Early-spring obser- 
vations showed that the stand was much poorer on the limed than 
on the unlimed plats, thus accounting, at least partially, for the 
lower yields. * 
The growth of redtop and orchard grass was good and the stand 
quite uniform. The results are therefore more significant, lime being 
without effect with cyanamid but beneficial with the other nitrogen 
carriers. 
CYANAMID AND UREPHOS AS FERTILIZERS WITH DIFFERENT PHOSPHATE CARRIERS. 
SECTION III. 
This experiment was planned primarily to compare mixtures of 
cyanamid and either basic slag or calcined phosphate with sodium 
nitrate and ammonium sulphate as standards. In addition, a few 
plats received Urephos, which contains both nitrogen and phos- 
phorus. In all cases except on the check plats nitrogen was sup- 
plied at the rate of 40 pounds per acre, half in the fall and the re- 
mainder in the spring. Phosphorus and potash were supplied to all 
plats in the fall at the rate of 65 pounds P 2 5 and 40 pounds K 2 0. In 
the case of Urephos either basic slag or acid phosphate was used to 
bring the total phosphoric acid content to 65 pounds for the fall 
application, but when an additional application of this material was 
made in the spring the total phosphoric acid was brought up to 90 
pounds per acre. The crops grown were wheat and rye. 
In considering the yields shown in Table 7, it will be observed that 
there are several wide variations in the yields of plats receiving the 
same treatments. This is because the duplicate plats were located 
at a considerable distance from each other, and the variations merely 
show the natural soil irregularities, which were beyond control. 
Table 7. — Yields per acre of wheat and rye from Section III of field Xo. 2. 
Treatment. 
No nitrogen (basic slag) 
Sodium nitrate (calcined phosphate)... 
Sodium nitrate (acid phosphate) 
Sodium nitrate (basic slag) 
Ammonium sulphate (acid phosphate). 
Cynamid (calcined phosphate) 
Cyanamid (basic slag) 
Urephos (basic slag) 
Urephos (acid phosphate) 
Yields of wheat (pounds). | Yields of rye (pounds). 
52705°— 24— Bull. 11 8( 
