40) Revorr of DEPARTMENT OF BACTERIOLOGY OF THE 
seen by bringing together the results of the observations on the 
experiments begun in 1905-06-07. 
TaBLeE [I.—SuMMARY OF THE Errrect or INOCULATION ON ALFALFA. 



No inoculation, Inoculation, 
success success 
Year 
= — - — 
1005 Sree itr <uros ya a 10 24 24 10 
LOQOSEEMY tastes Wie shea ae 5) 28 24 9 
160 7Zihecs. Wash. elie Pict 10 26 18y\ fal marae 
A OVAIB Ps eee re ec 25 78 66 p 37 







This shows that among 103 experimental fields there were 
but 25 where a successful crop of alfalfa was produced without 
the aid of inoculating soil. This would indicate that under 
such circumstances the chance of a success is only about one 
in five. 
Again it is seen that 66 of the adjoining plats to which in- 
oculating soil had been applied produced successful crops of 
alfalfa. Here the use of this soil from our alfalfa field has 
increased the number of successful fields by 40 per ct. and this 
would indicate that where inoculating soil is used in connec- 
tion with the sowing of alfalfa the chance of getting a success- 
ful crop is about three out of five. From these experiments it 
would seem plain that in beginning to grow alfalfa proper in- 
oculation of the soil is a point which is worthy of the careful 
attention of any farmer in this State. 
GEOGRAPHICAL DISTRIBUTION OF INOCULATION EXPERIMENTS. 
The 36 experiments here recorded represent 20 counties and, 
taken in connection with the 67 experiments recorded in Bul- 
letin 300, give returns from one or more fields in 39 of the 61 
