264: Report of Experiments with dijferent Manures 
1. — Plantago lanceolata — Rib-grass or Plantain. 
Til is plant is reputed to yield an herbage v.'hich, early in the 
season, is eaten by cattle, horses, and sheep ; but which is dis- 
liked by them as the season advances. It is also objectionable 
on account of its spreading leaves, which tend to exclude other 
plants. It is natural to dry pastures. It flowers in June and July. 
Nearly 16 per cent, of the produce without manure consisted 
of Miscellaneous Weed// herbage. This comprised seven descrip- 
tions of plant, yet nearly 11 out of the 16 parts consisted 
of the Rib-grass. None of it was found in the produce grown 
by mineral manures alone ; scarcely any in that by ammoniacal 
salts alone ; less still in that by the same amount of ammoniacal 
salts and the mineral manures ; and none at all in that by the 
double amount of ammoniacal salts and the mineral manures. 
On the farm-yard manure plot less than 2 per cent, of the total 
produce, or only about one-sixth as much as on the unmanured 
land, consisted of the Rib-grass, The addition of ammoniacal 
salts to the farm-yard manure, however, greatly increased the 
proportion of Rib-grass in the produce — namely, to 8J per cent. 
It appears, then, that the Rib-grass, which was so prominent an 
item on the unmanured land, was greatly reduced in its propor- 
tion by farm-yard manure and ammoniacal salts ; still more by 
farm-yard manure alone ; and nearly or entirely excluded l)y 
those artificial manures which increase the most the total produce 
of hay, and especially that of the Graminaceous herbage. 
2. — Carum carui — Common Caraioay. 
This plant, though second in amount among the Miscellaneous 
Weedy herbage on the unmanured land, amounted there to less 
than 2 per cent, of the total produce, and to about the same pro- 
portion in the produce of the two farm-yard manure plots. It was 
much diminished in its proportion, or excluded altogether, by 
the purely-artificial manures, especially when ammoniacal salts 
were in relative excess. 
3. — Achillcea millefolium — Common Yarrow or Milfoil. 
The Milfoil is stated to be a grateful element in small admix- 
ture with other herbage for sheep ; and it is recommended, there- 
fore, to be sown with other seed for permanent sheep-pasture. 
The Milfoil was found to the amount of somewhat more than 
1 per cent, in the produce without manure. Its proportion was 
much diminished by farm-yard manure alone, mineral manure 
alone, and the mixtures of the mineral manure and ammoniacal 
salts. Wliere the larger amount of ammoniacal salts was used 
(with mineral manure) both the proportion and the actual 
