124 THE ROYAL SOCIETY OF CANADA 
the time of seeding. The yield from the inoculated plot was at the rate 
of 7,200 pounds per acre, while that of the untreated area was 2,500 
pounds. No doubt the phenomenal success of this inoculation was in 
a large part due to the absence of nitrogen-fixing bacteria in the original 
soil. An inspection of the samples of alfalfa hay very clearly showed 
that the plants from the inoculated plot had been by far more robust, 
that is, taller, stouter and greener, than those from the adjacent un- 
inoculated area. These hays were submitted to analysis with the view 
of ascertaining their relative feeding value. 
ANALYSIS OF ALFALFA HAYS. 





Inoculated | Uninoculated 
plot | plot 
| p.c. | p.c. 
MOISTUrES RE CT RC ER 6-38 | 5-99 
Probe ere DHL OME eR Occ CNE 17-81 | 15-62 
RARE ea cies ee MID, AMP, gs NEA eng 1511 ei 1-05 
CarbobyArAteS EEE ee RC CC EL 36-72 40-75 
EDT 0 Re NE UN heels aces cs acer pee Blan ec ere eee eee 27-89 | 25-60 
EAST re a A ae Bch Ce cn Pee 10-09 11-01 
100-00 | 100-00 
The larger proportion of crude protein in the hay from the inocu- 
lated plot is a matter of considerable importance, though not one of 
surprise, as we had in previous work occasionally found the inoculated 
legume to be the richer in nitrogen. 
The results in the field and laboratory, therefore, show that in this 
case inoculation has not only increased the yield, but given a higher 
nutritive value to the fodder produced. 
INCREASE OF NITROGEN-CONTENT OF SoILS THROUGH THE 
GROWTH OF CLOVER. 
As already stated, the authors reported to this Society in 1905, 
the first two years’ results obtained from a plot continuously growing 
clover, showing that by such treatment the soil had been enriched to 
the extent of 175 pounds per acre. This plot first seeded in 1902 has 
been constantly in clover since that date. Every second year the plot 
has been dug over and resown. The crop is cut as often as required 
and the material allowed to decay on the soil. From time to time the 
soil of this plot has been sampled and its nitrogen-content determined. 
The results to May, 1911, are tabulated as follows:— 
