[SHUTT] NITROGEN-ENRICHMENT OF SOILS 121 
The clover in the field trials was very poor during the first season 
(1909). Owing to the “catch” from the first seeding being patchy on 
all the plots, due to the very dry weather that prevailed, a second seed- 
ing one month later was decided on. At the close of the season the 
growth was found to be very irregular and it consequently was thought 
undesirable to record the relative yields. The plots were left for experi- 
mentation during the season of 1910, when they furnished the following 
data: 
HILTNER’S CULTURE—RED CLOVER—PLOT EXPERIMENT. 


Uninoculated Seed Inoculated Soil Inoculated 

Fresh | Air-dried| Fresh Air-dried Fresh | Air-dried 


Lbs. Oz.|Lbs. Oz.ILbs. Oz./Lbs. Oz.|/Lbs. Oz.|Lbs. Oz. 





fStICUbtIMe see - Gio CAAT SOD IA eGSa ee Olas eck OO is 2 
21) NN cere oe eee 10 6 1 10 | 15 {MINE S 7 14 1 4 
3rd Sle EE tte 19 oe 4 om) 16 1 3 10 | 10 6 2 8 
Mota ise seceee 97 AD toes Lo oO ume aS 2 | 68 5 | 11 14 

At the time of the first cutting all three plots were in bloom, and 
all equally advanced. The yields on the “uninoculated” and “seed 
inoculated” plots, weighed both green and as hay, were very close, and 
considerably higher than that on the soil inoculated area. 
At the second cutting the “seed inoculated” plot was the heaviest, 
the yield from the “soil inoculated ” still remaining the lightest. At the 
third cutting, the position of the two former plots as regards yields was 
reversed, the “uninoculated” crop being, weighed green, three pounds 
heavier. 
Considering totals, we have results in accord with those of the first 
cutting, viz., no differences of importance (or, at least, from which it 
would be safe to make deductions) between the yields of the “uninocu- 
lated” and “seed inoculated” areas, with a decidedly lower yield from 
the “soil inoculated” plot. 
The alfalfa plots adjomed those of the clover and peas and were 
seeded without a nurse crop, at the rate of 25 pounds per acre. The soil, 
as remarked, was quite poor and the growth of the first season in con- 
sequence, meagre. The yields from the “uninoculated” and “soil 
inoculated” plots are seen to be practically identical, that from the 
seed inoculated area being decidedly less. It is interesting to note that 
in this regard the results from the pots and plots correspond. 
Sec. III., 1912. 9. 
