Gruiotli of Red Clover hij different Manures. 
183 
On comparing the amount of produce of wheat in these experi- 
inonts, with that obtained in the adjoining fiekl on the plots 
where large quantities of both mineral and nitrogenous manures 
were employed, there is every reason to l)elievc that it would 
have been considerably greater had the season been more favour- 
able. For, as it was, the yield after the Clover, was fully equal 
to that in the other field where very large amounts of manure 
were used. It would appear, therefore, that the cro]) had reached 
the limit of development which the characters of that particular 
season admitted of. 
In the spring of 1850, Red Clover was sown upon the young 
wheat ; but after the removal of the corn-crop, it was considered 
that there was not a sufficient plant of Clover to stand. It was, 
therefore, ploughed up, re-manured, and re-sown with Clover, as 
described below. 
The same mineral manures as were applied for the Clover-crop 
of 1849, were re-sown on the same spaces — that is, both on the 
plots which before received mineral manure alone, and on those 
Avhich had received both mineral manure and ammoniacal-salts. 
The application of ammoniacal salts was, however, not repeated ; 
but, in order to secure a greater variety of manuring, a portion 
of the plots which had before been dressed with mineral manure 
alone (Series 1 of Tables I. and II.), and an equal portion of 
those formerly manured with both mineral manure and ammo- 
niacal salts (Series 2 of Tables I. and II.), were now manured 
Avith a compost of dung and lime (in addition to the newly- 
supplied mineral manures), at the rate of 15 tons of farmyard- 
manure, and 60 bushels of fresh lime, per acre. The dung and 
lime were mixed, and then clamped on the respective plots, some 
time before being spread and ploughed into the land. The 
object of this experiment was to get a more rapid decomposition 
of the dung, with possibly the formation of certain organic com- 
pounds, somewhat of the nature of humus or its • derivatives. 
For similar reasons the portion of the experimental land manured 
with rape-cake in 1849, was now divided, and manured with soot ; 
with soot and lime ; or with soot, lime, the mixed alkalies, and 
superphosphate of lime. 
Instead therefore of three Series of plots as formerly, the expe- 
rimental land was now divided into four Series, as under : — • 
Series 1, With mineral manure alone (or unmanured on 
Plot I.), as in 1849. 
Series 2. With mineral manure (or without, on Plot I.), and a 
mixture of farmyard-manure rotted with lime, in addition ; 
half of each plot having, in 1849, the mineral manure alone, 
and the other half the mineral manure and ammoniacal- 
salts. 
