ON THE MIXED HERBAGE OE PERMANENT MEADOW. 
1257 
Table LII.—Relative predominance of Trifolium pratense , 
This plant was first among four leguminous species on six plots in 1862, on two in 
1867, and on one only in 1872 and 1877. It was second on seven plots in 1862, on 
nine in 1867, on nine in 1872, and on six in 1877, and it was third on two in 182, 
on three in 1867, on five in 1872, and on six in 1877: But it contributed as much as 
5 per cent, to the total produce on only two plots, with purely mineral manure, and 
on these only in the first of the four separation-years. 
It is practically absent from the samples taken from the plots where ammonia-salts 
are applied, whether these be used alone or in conjunction with mineral manures. It 
has gone down, but in a less degree, where nitrate of soda has been used. It has 
also gone down on the plots most favourable to Leguminosm in general, and where it 
increased considerably in the early years—namely, those where mixed mineral manure, 
including potass, was employed. Finally, it has maintained a more uniform position 
on the unmanured plots, where there is no luxuriance of any species, than anywhere 
else ; but here, in the later years, it has only contributed about 2 per cent, of the total 
produce. It has, in fact, not maintained even moderate prominence where there was 
any luxuriance of the grasses; and where the conditions were more favourable for the 
