270 Eeport of Experimenta loith different 31anures 
of Leguminous herbage, and particularly of Clover, was therefore 
very striking. Artificial nitrogenous manures, on the other hand, 
seemed almost to extirpate such plants from the mixed herbage of 
the Meadow-land. 'J hese results are perfectly consistent with tliose 
observed in the manuring of Leguminous crops (beans, clover, &c.) 
when grown in isolation. Mineral manures have been found greatly 
to increase such crops, whenever a good plant could be once ob- 
tained and the season was not unfavourable. These crops, on the 
other hand — so highly nitrogenous both in their per-centage com- 
position, and in their acreage yield — have not been found to be 
specially benefited by the direct use of ammoniacal salts ; though 
nitrate of soda appears somewhat more favourable to their growth. 
The general coincidence in the results obtained in regard to the 
action of characteristic descriptions of manure, on the agricultural 
plants included within each of these two great families (the 
Graminaceae and the Leguminosae), whether they be grown sepa- 
ratehj and in alternation, or side by side in a mixed herbage, is 
very striking. Such a coincidence, under such very varied con- 
ditions, must show, that the result is really due to the plants of 
the respective families requiring for their luxuriant growth a 
widely different relation of the mineral and nitrogenous supplies, 
respectively, within the soil. It cannot, under such circumstances, 
be attributed to mere local peculiarities, or to the mere acci- 
dental conditions of exhaustion induced by this or that agri- 
cultural practice. We have, then, in the facts observed in 
regard to the action of characteristic descriptions of manure in 
developing the different plants of which the mixed herbage of a 
meadow is made up, an unexpected, and very interesting confir- 
mation, of those which have been established in regard to the 
development of the widely different plants wliich are grown in 
rotation. Such a coincidence must tend to inspire confidence in 
the conclusions arrived at in each of the widely different, and 
separately interesting, paths of inquiry. 
3. — Total Miscellaneous Herbage (chiejlg Weeds). 
These plants were the most numerous in kind, and nearlv in 
the greatest proportion, on the unmanurcd land. The produce 
without manure contained nearly 16, that grown by farm-yard 
manure and ammoniacal salts more than IG, and that by farm- 
yard manure alone 7 per cent., of Miscellaneous or Weedy herbage. 
In the produce without manure, about two-thirds of the amount 
of such herbage was Plantain or Rib-grass ; and in that by the 
farm-yard manure and ammoniacal salts about the same propor- 
tion of tlic whole consisted of Kib-grass in the larger, and Sliecp's 
Sorrel or Dock in tlie smaller quantity. On the other hand, tiie 
produce grown by those artificial manures which gave the largest 
