Mixed Herharje of Grass-Land. 
1.37 
were small both in number and amount. The general result is, 
that with the larger amount of nitrate and the mixed mineral 
manure — as with the corresponding amount of ammonia-salts 
and mixed mineral manure — both the number of species and the 
total amount of Miscellaneous plants were comparatively small. 
Effects of Ammonia- Salts and mixed Mineral Manure. 
There remain to be noticed, the distribution and predominanro 
of species, on Plots 10, 11, 12a, \2h, 13o, and 135, on which both 
ammonia-salts and mixed mineral manure were employed, and 
on which by far the largest crops were obtained. 
Excepting in the case of Plot 11, where in 1862 potass was 
excluded from the mineral manure, the produce contained from 
89J to 95 per cent, of Graminaceous herbage ; and the five 
predominating grasses ranged from about 61^ to about 68^ per 
cent, of the total produce. In four out of the six cases the 
free-growing and bulky Dactylis glomerata was the predomi- 
nating grass, contributing in one case 31 per cent, and in 
the case of the smallest amount of it nearly 22 per cent, of the 
total produce. In the two other cases, the Avena pubescens 
and A. flavescens in about equal proportions predominated, 
amounting together to from 18 to 19 per cent. In two out 
of the four cases where Dactylis predominated (Plots ISrt 
and 136) a very excessive amount of ammonia-salts was cm- 
ployed ; and in the one case the mineral manure contained 
silicates, when a considerably larger amount of Agrostis was 
found in the produce, bat whether the result were really due to 
the supply of the silicates may be a question. In fact, it was 
in dealing with the verv heavy and luxuriant crops that the 
difficulty of fairly sampling was the greatest ; and we would, 
therefore, especially in such cases, rest our conclusions much 
more upon the general than upon the exact indications of the 
figures. Although Agrostis and Holcus, two bad elements, 
occurred in considerable quantity in the bulky produce of all the 
highly-manured plots, it is satisfactory to observe that the free- 
growing and useful Dactylis, the sweet and much-relished Avena 
pubescens and A. flavescens, the useful Poa trivialis, and the 
free-growing and nutritive Lolium were all prominent com- 
ponents in these luxuriant crops. Of other grasses, Festuca 
duriuscula or F. pratensis came next in order of prevalence, the 
rest occurring for the most part in very insignificant proportions. 
Of Leguminous plants these heavy crops in some cases con- 
tained scarcely a trace, and in others only very insignificant 
amounts. 
Of Miscellaneous herbage, Rumcx acetosa, as usual with full 
