1422 



MANURES AND MANURING 



Table II. — Relative yields of lucerne 1 913-14, 1914-15. 



Method of inoculation 



Inoculated after "ermination 



No manure .... 



Lime 



f Complete manure 



( No manure .... 



Inoculated befc)re sowing lyime 



f Complete manure. . 



1 No manure .... 



Seed inoculated with lucerne rhizobia . . ■: Eime 



1 Complete manure. . 



( No manure .... 



Not inoculated } E'me 



f Complete manure. . 



Inoculated with soil of same composition. 



Inoculated with soil of different composition 



Complete manure . 



Uime 



No manure . . . 



Complete luanure 



Uime 



No manure . . . 



Seed inoculated with vetch rhizobia . 



No manure . . . 



{ lyime 



Complete manure . 



Relative >-ield, 



check plot = 100 



86.03 

 105.66- 

 102.88 



86.01 

 106.72 

 119.51 



74-72 

 112.82 

 117.03 



85.36 

 115-79 

 115. 16 



94.52 



107.14 

 102.29 



ICO.63 



117-35 

 106.58 



89.64 



102.51 



99.34 



The land after being carefully prepared, was divided up so that each 

 method of inoculation except 3a was tried with : a) no manure, h) lime at 

 the rate of one ton per acre and c) complete manure (i cwt. superphos- 

 phate, Yi cwt. sulphate of potash, Yi cwt. sulphate of ammonia per acre). 

 About three months after sowing, samples of roots were examined for no- 

 dule formation with the results given in Table I. Ten months after the laying 

 down of the experiment another examination was made for nodules. The 

 restilts obtained were similar to the previous ones, but it was evident 

 that the earlier examination was the more reliable as the older the plant the 

 deeper are the fine roots on which the nodules are found and the greater 

 the difficulty in uprooting them. Moreover if the treatment is efficacious, 

 nodules will be found on the young plant as early as six months after ger- 

 mination. Finally in February and ]March 1916, four years after the begin- 



