on Permanent Meadov) Land. 
2G9 
naceous produce contained twice as liigli a proportion of both the 
valuable Rye-grass, and the inferior Woolly soft -grass, as that with- 
out manure. The proportion of the Oat-like grass was, on the 
other hand, diminished ; and, under the same conditions, all the 
other grasses were either very much reduced, or entirely excluded. 
When the double and excessive amount of aininoniacal salts 
was employed (with the mineral manure), the produce was about 
2| times as much as on the unmanured land, and the proportion 
of it that was Graminaceous was, as in the last case mentioned, 
more than 97 per cent. This greatly-increased Graminaceous 
produce, under the influence of an excess of ammoniacal salts, 
contained a smaller proportion of the common Rye-grass than the 
vmmanured hay. On the other hand, the proportion of the 
inferior Woolly soft-grass was very much increased. There was, 
moreover, with this manure a very large proportion of Rough 
Cock's- foot — a grass which was found on very few of the other 
plots, and then in very small proportion. All the other grasses 
were either excluded, or much reduced in amount, under the 
influence of this excessive manuring. 
2. — Total Leguminous Herbage. 
The proportion of Leguminous herbage in the total produce 
without manure was about b per cent. Farm-yard manure re- 
duced the proportion, but not the acreage amount, of such produce ; 
and the combination of farm-yard manure and ammoniacal salts, 
very considerably reduced both the actual amount, and proportion, 
of this kind of herbage. In the produce by those artificial com- 
binations (mineral manure and ammoniacal salts), which more 
than doubled or nearly trebled the amount of hay, and which 
increased the amount and proportion of the Graminaceous herbage 
so strikingly, not a trace of Leguminous herbage was found. 
Again, ammoniacal salts alone, which notably increased the 
Graminaceous herbage, almost excluded the Leguminous. In 
the produce with this manure, neither Bird's-foot Trefoil nor 
Perennial Red Clover was found ; but the Meadow Vetchling oc- 
curred in about the same proportion as in the unmanured produce. 
On the other hand, mineral manures alone, which gave little or no 
increase of Graminaceous produce, increased very strikingly both 
the actual amount, and the proportion, of the Leguminous herbage. 
The proportion of total Leguminous herbage in the produce by 
mineral manures alone was 23 per cent., instead of only 5 per cent, 
in that without manure. The proportion of the Bird's-foot Trefoil 
was diminished by the mineral manures ; that of the Meadow 
Vetchling was notably increased ; and that of the Perennial Red 
Clover very considerably so. 
The effect of mineral manures in developing a large proportion 
