1404 MESSRS. J. B. LAWES, J. H. GILBERT, AND M. T. MASTERS, 
On th.e other hand, both the Leguminosse and the Miscellaneae diminished in per¬ 
centage from one separation-year to another. 
Among the Leguminosse, there was a slight tendency to increase in the proportion of 
Lathyrus pratensis; but there was a considerable decrease in that of Trifolium 
pratense , and some in that of T. repens, and Lotus corniculatus. 
Among the six Miscellanese which contributed 1 per cent, to the produce in one or 
other separation-year, Rumex Acetosa, Ranunculus repens and bulbosus, Rlantago lanceo- 
lata, and Luzula campestris, markedly declined from the first to the third of the three 
separation-years; whilst Achillea Millefolium showed some tendency to increase, and 
Conopodium denudatum but little either to increase or decrease. Among these, Rumex 
Acetosa was in very abnormally high amount in the first of the three separation-years 
(1867), in which it will be remembered there was a very large quantity of miscellaneous 
herbage on most plots. The Rumex continued, however, to maintain the first place, 
Conopodium denudatum and Ranunculus repens and bulbosus also remaining prominent. 
The columns of actual yield per acre also show an increase in that of the Gramme®, 
and a diminution in that of both Leguminosse and Miscellanese, 
Comparing the actual yield per acre of the different species and groups on plot 18 
with that on plot 3, without manure, there is (with two exceptions in the first year) 
an increased yield of every grass in each of the three separation-years under the 
influence of the manure. The increase in the actual yield of the grasses collectively 
was very great from one separation-year to another, and it was much the greatest in 
the case of the poorer and superficially-rooting grasses already referred to, viz. : 
Festuca ovina, Agrostis vulgaris, Holcus lanatus, and Anthoxanthum odoratum. 
Of Leguminosse, there was on the manured plot less actual yield of the two Tri - 
foliums ; the most marked decline was in the deeply-rooting Lotus corniculatus ; and 
there was a uniform but slight increase in the more superficially-feeding Lathyrus 
only. Confining attention to the two later separation-years, when the characteristics 
of the plot had become the more established, it is seen that there was, with the manure, 
a greater actual yield of Rumex Acetosa, Conopodium denudatum, Ranunculus repens 
and bulbosus, and Achillea Millefolium ; but there was a decrease compared with the 
produce without manure, of Rlantago lanceolata wad Luzula campestris, two frequently 
very persistent elements on permanent grass land under poor conditions. 
Upon the whole, it is evident that, with this mixed manure containing the different 
constituents approximately in the proportion in which they occur in the crop to be 
grown, with the supply of nitrogen limited, and in the form of ammonia-salts. 
The effect was by no means equally to favour the increased growth of the groups or 
species as they were found in the mixed herbage. The effect was, on the other hand, 
especially to favour the grasses, which came to be very prominent, and particularly the 
poorer and more superficially-rooting species, which are the most predominant under 
poor conditions, and which are reputed to be of inferior quality. Further, the amount 
of leguminous herbage grown on a given area was actually reduced ; whilst that of 
