~ New Yorr AGRICULTURAL EXPERIMENT SraTion. 51 
While these results are too few to settle definitely the value 
of litmus paper as an indicator of the need of lime in growing 
alfalfa they indicate that little information of value can be 
obtained by an observation of its action. 
Ill. THE COMBINED INFLUENCE OF. LIME AND 
INOCULATION. 
The results already given for inoculation indicate that in our 
experimental fields the addition of inoculating soil alone in- 
creased the chance of a successful crop about 40 per ct. and 
similar tests with lime alone indicate that by its use the chance 
of success was increased 25 per ct. Where both lime and in- 
oculation were applied together it would be natural to expect 
that there would be a cumulative effect and that the chance of 
success would be increased by practically the sum of the two 
factors. 
As has already been noted this combined effect has. ordinarily 
been tested in connection with the same experimental plats 
upon which the factors were determined separately. This is 
especially true of the experiments begun in 1907 which were 
laid out according to the plan given on page 35. 
A summary of the results observed in this connection in the 
experiments begun during 1905-06-07 is given in Table VII. 
TaBLE VII.—Summary OF THE EFFrect OF INOCULATION AND 
LIME ON ALFALFA. 

No lime and Lime and 
ce om 





no inoculation inoculation 
Year Success Success 
+ _ + — 
ETS pe Oe i ae et 2 0 5 2 3 
N42 ae APE Ge IRONS Oo | ole MS 1 22 20 3 
RG er scree che 3 cB ll 26 28 9 
atala ater ae LQitenk iin BS 50 15 

