1338 MESSRS. J. B. LAWES, J. H. GILBERT, ARD M. T. MASTERS, 
shown by the intermediate and recent partial separations, the tendency to decrease 
in total yield of Graminese, to decrease in a greater degree (in proportion to their 
amount) in the yield of the Leguminosse, and to decrease somewhat in that of the 
miscellaneous species also, cannot be doubted. The most prominent and unquestion¬ 
able of all these results was, however, the great and continuous decline in leguminous 
growth after the exclusion of the potass. 
Looking to the particulars relating to the individual species, the first point to note 
is the large number of species, especially of the grasses, contributing fairly to the yield, 
and the comparatively small number asserting very marked predominance, these being 
the indications of languid struggle. Among the grasses, Festuca ovina and Holcus lanatus 
are the only species which have very obviously gained ground; the latter, however, 
showing considerable fluctuation from one separation-year to another. Agrostis vulgaris 
has also yielded a comparatively large proportion, and has, upon the whole, increased 
in relative amount. The meagre-growing Anthoxanthum odoratum, though giving a 
less average percentage than any of the foregoing, has, nevertheless, continuously 
increased. 
Among the grasses which have the most obviously diminished in percentage are, 
Arena pubescens , which has done so the most strikingly of all, Poa trivalis , Dactylis 
glomerata, Festuca pratensis, and Bromus mollis; Lolium perenne doing so up to the 
third separation-year, but afterwards regaining ground. Those which have shown 
comparative indifference, fluctuating from season to season without any very obvious 
tendency, independently of season, either to increase or diminish, are Arena elatior, 
Arena flarescens, and, though occurring in much smaller amount, Poa pratensis. 
Comparing the actual yield per acre with that without manure, it is seen that, 
among the grasses yielding more than one per cent, to the herbage, there was, on 
the average, and almost uniformly in detail, an increased amount of every species, 
excepting Briza media , which alone was in each separation-year in less quantity than 
without manure. The grasses which give the largest increase compared with the 
unmanured plot are Holcus lanatus, Festuca ovina, Arena elatior, Arena flarescens, 
and Poa tririalis. It is thus obvious that the conditions, either owiug to the con¬ 
stituents still supplied, or to the residue of the previous applications of potass, were 
still favourable to an increased growth of Graminese. 
Compared with the produce of plot 7, with the continuous application of potass, 
there are, on the other hand, nine grasses that give, on the average, less on plot 8, 
and only six which give, on the average, more ; the balance as to total quantity being 
considerably and increasingly against plot 8. Indeed, if the results of the first 
separation-year—that is, of the first year of change—were not included in the general 
mean, the result would be very much more strikingly against plot 8, as compared with 
plot 7, in the yield of grasses. As the table stands, the grasses which yield actually 
more without than with the potass are Arena elatior, Anthoxanthum odoratum, 
Lolium perenne, and, in much less degree, Cynosurus cristatus, Festuca pratensis, and 
