Growth of Red Clover hij different Manures. 
181 
As our object in the present sliort communication is to do 
little more than call attention to the <;reat variety of conditions 
under whicli the Clover-plant has failed, we shall not enter, on 
this occasion, into any detailed examination of the action of the 
various manures, in regard either to the amount of produce ob- 
tained under the different circumstances of season and manuring, 
or to the chemical composition of the plant. It will be sufficient 
to point out, that, in every case, the crop of this first year of the 
t\xperiment was a very large one ; amounting, in three cuttings, to 
about 14 tons of fresli green produce, equal to about o;} tons of 
hay, without the addition of manure of any kind ; and where 
sulphate of potash, sulphate of potash and superphosphate of 
lime, or sulphates of potash, soda, and magnesia, were em- 
ployed, 17 to 18 tons of green produce (equal to from about 
4^ to nearly 5 tons of hay), per acre were obtained. When to 
the mineral manures were added those salts of ammonia which 
so greatly increase the produce of our Cereal crops, the pro- 
duce of this Leguminous plant was upon tlie whole less than 
where the mineral manures were used alone. It will be seen 
too, that the rape-cake (Series 3) gave a smaller crop than either 
the mineral manures alone, or the mineral manures together with 
ammoniacal salts. 
After the third cutting of Clover (1849) had been taken from 
the land, it was ploughed up and sown with wheat, about the 
middle of November, without any further manuring. The pro- 
duce — corn, straw, «Scc. — is given in Table II. 
It will be observed that the weight per bushel of corn, of this 
wheat-crop, scarcely in any case reached 58 lbs. ; and in its case, as 
well as in that of an adjoining experimental field, the proportion 
of corn to straw was rather low. The wheat grown after the 
Clover on the unmanured plot gave, however, bushels of corn, 
or 14 bushels more than was obtained in the adjoining field, 
where wheat was grown after wheat without manure. This 
result is quite consistent with that obtained in ordinary farm- 
practice. It should be observed, however, that in the unmanured 
Clover-crop of 1849, very much larger quantities both of mineral 
constituents and of nitrogen were taken from the land, than were 
removed in the unmanured wheat-croji in the same year, in the 
adjoining field ; and it is seen that, notwithstanding this, the 
soil from which the Clover had been taken, was in a condition to 
yield 14 bushels more wheat per aere than that upon which wheat 
had been previously grown. 
Where salts of ammonia had been applied, in addition to the 
mineral manures, for the Clover of 1849, there was an average 
of about 2 bushels more wheat per acre in 1850, than where the 
ammonia-salts had not been supplied. 
On 
