E. J. KUSSELL AND A. APPLEVAKD 



19 



The relation ski J) of CO., to oxygen. 



The oxygen curves are generally reciprocal to the CO, curves, 

 i.e. the oxygen falls as the COg rises, and the agreement is sufficiently 

 close to justify the assumption that the oxygen is mainly used up in 

 l^roducing CO2. But the agreement is not absolute and the discre- 

 pancies are considerably beyond the limits of experimental error. 



Table V. Relalion.'shi.p of CO2 tu oxygen at tifnes of rajjid 

 nitrification. 



Hoos fallow 



Hoos wheat 



Nov. 1913 

 Dec. „ 



Feb. 1914 

 May „ 



Nov. 1913 

 Dec. „ 



Mar. 1914 

 April .. 



0-33 

 U-32 



0-04 

 0-05 



0-11 

 0-10 



0-03 

 0-10 



21 06 

 20-57 



20-85 

 20-73 



20-90 

 20-76 



20-75 

 2()-58 



21-39 



20-89 



20-89 

 20-78 



21-01 

 20-86 



20-78 

 20-68 



0-50 

 0-11 



0-15 

 UIO 



11 



3-5 



