156 INFLUENCE OF MANURES ON GRASS LAND. 

the form of slag than when applied as super. At the two 
stations where varying amounts of slag were tried, the per- 
centage of cocksfoot was lower with a large than with a small 
amount of slag. 
Table IV.—Effects of Manures on Cocksfoot (Set 2). 













| Manures per Acre. Gosforth. | Wigton. 
Plots. Fe | | eee are = Tee | a ~ 
lof Soda-| Super-| Slag. | Kainit. 92, cockstiot. | Hay.” |  Cocksfoot. 
i 
a _—-—— —— 
| Ibs Ibs Ibs. Ibs cwt. | | Ibs. |] cwt. 3 Ibs 
I i = = = — 27% | 14°7 452 26} 4°8 142 
2 | 112 392 — 292 25 | 172 476 27 6°6 IGG 
3 | 112 196 — 392 | 21 16°5 388 24 I4°0 375 
4 Fae 588 34 392 233 17°6 468 20% 9°3 | 304 
5 || 242 392 — 196 23 375 218 3035 T4°5 495 
6 | I12 392 = 588 | 233 154 401 334 13°I 487 
7 56 392 — 392 «||_:«232 17°6 463 || 29 6°6 214 
8 || 168 392 292 24% | 22°6 626 343 72 278 
9 } 56 | = 320 392 231 | 18°83 | 489 | 34 | 16°r |) Gig 
IO | 56 | = 480 392 212 | 12°2 | 2907. +~*|| +38 | 12°2 | ‘g22 






The Influence on Cocksfoot of Kainit and Lime.—Apparently 
neither of these two manures has had any particular effect on 
this plant. 
CRESTED DOGSTAII (TABLES V. AND VI). 
Thisplant was generally present in moderate quantity at the 
four stations of Set 1, and at three of the stations of Set 2. 
The Influence on Crested Dogstail of Nitrate of Soda.—The 
action of this manure on crested dogstail is very peculiar 
and yet perfectly consistent. In every case where nitrate of 
soda is used alone, or as an addition to kainit, it has reduced 
the percentage of this grass; while, equally invariably, in 
has increased the percentage of crested dogstail when used 
(a) with superphosphate or (6) with both super. and kainit. 
This result is the converse of the action of nitrate of soda on 
Agrostis (see page 151), and doubtless admits of explanation 
For the present, however, it need only be said that the two 
cases furnish instances of a poor plant (Agrostis) being 
repressed and a good plant (crested dogstail) being en- 
couraged by the judicious use of nitrate of soda, whereas the 
opposite is the case when the same manure is applied in an 
irrational manner. 
