169 INFLUENCE OF MANURES ON GRASS LAND. 

local conditions have much to do with determining the 
effects of the influence of super.on Yorkshire fog, and, in 
any case, it is more than likely that phosphatic manure 
encourages this species only indirectly, through the 
nitrogen which is stored up in the soil by the leguminous 
vegetation that usually follows the application of such a 
manure. 
At two of the four stations of Set 2 an increase in the 
percentage of Yorkshire fog kept pace with an increase in 
the dressing of super. At the other two stations this result 
is not observable. | 
There is no consistent difference in the influence of super. 
and slag on this pliant. 
The Influence on Yorkshire fog of Katnit.—At Blencow 
kainit has always increased the percentage of Yorkshire 
fog, while at Castle Carrock the reverse has almost as 
invariably happened. At the other two stations of Set I no 
consistent influence in this respect can be traced, though the 
tendency is towards an increase. The same is true where 
varying amounts of kainit were used at the four stations of 
Set 2, in three cases a considerably larger amount of York- 
shire Fog being produced by the largest than by the smallest 
dose of kainit. 
The Influence on Yorkshire Fog of Lime.—Three times in four 
lime reduced the percentage of this plant. 
LEGUMINOSZ (TABLES IX. AND X.). 
The members of this family of plants that were chiefly met 
with were White and Red Clover, Birds’ Foot Trefoil, 
Meadow Vetchling, Vzcza septum, and V.cracca. All were 
separately determined, but here they may be regarded 
collectively. 
The influcnce on Leguminose of Nitrate of Soda.—Eleven 
times in sixteen tests (Set 1) these plants were reduced in 
amount by the use of nitrate, the diminution in quantity 
being often very large. Where this manure was increased 
from a half to one and a half cwt. per acre (Plots 7 and 8, 
Table X.) the Leguminose were invariably reduced, some- 
times almost to the point of total disappearance. With but 
