526 Miss F. A. Mockeridge. Effects of Auximones on 



employed fail to extract the total amount of the activating substances 

 present in the bacterised peat, although they show that the material 

 separated in the various fractions has the effect of appreciably increasing 

 the rate of nitrification as well as nitrogen fixation. 



Table XII. 



Flask. 



Contents. 



Nitric 

 nitrogen 

 in 

 25 c.c. 



Equivalent 



to nitric 

 nitrogen in 

 whole. 



14 days. 



Nitric 

 nitrogen 



in 

 10 c.c. 



Equivalent 



to nitric 

 nitrogen in 

 whole. 



10 

 11 

 12 



13 

 14 

 15 

 16 

 17 

 18 



19 

 20 

 21 



22 

 23 

 24 



25 

 26 

 27 

 28 

 29 

 30 



Control 



100 c.c. Winogradsky's medium 



Control 



100 c.c. Winogradsky's medium + 

 silver fraction from 1 grm. 

 bacterised peat 



Control 



» 



100 c.c. ammonium humate solution 



Control 



100 c.c. ammonium humate solution 

 + silver fraction from 1 grm. 

 bacterised peat 



Control 



100 c.c. bacterised peat extract 



mgrm. 



o-oi 

 o-oi 



0-18 

 0-19 

 0-18 

 0-17 



0-01 



o-oi 



0-31 



30 

 28 

 28 



006 



008 



11 



12 



12 



10 



006 

 006 

 16 



0-15 

 0-18 

 0-16 



0-016 



0-012 



0-35 



0-35 



0-38 



0-34 



0-04-1 

 0-04J u 

 1 -24^ 



01 



•028 



>0-45 



•024 



•056 



-1 -42 



mgrm. 



0-005 



005 



0-51 



0-55 



-54 



0-52 



-004 

 0-005 

 0-75 



0-35 

 0-36 

 0-30 



0-007 



0-005 



0-79 



0'81 



0-78 



0-76 



•ft' — 



:}» 



mgrm 

 0-05 

 0-05 

 5-1 

 5-5 

 5 -4 

 5-2 



05 



5 -3 







•77 



7 







•79 



7 







•73 



7 







•003 











•003 











•25 



2 







■22 



2 







•22 



2 







•26 



2 







■003 











•002 











•37 



3 



0-041 

 0-05 J u 

 7-5 1 



045 



3-5 

 3-6 

 3 -0 



i-7-6 



1 0-03 



.2-4 



}« 



025 



3-4 



0-071 

 0-05| u 



7- 9 1 



8- 1 

 7-8 

 7-6 



06 

 7-8 



Ammonification. 



The cycle of changes which nitrogenous substances undergo in the soil is a 

 complex one, and in marked contrast to the two processes investigated above 



