THe Carson DIoxiDE OF THE Sort AIR 355 
‘ABLE 2. Carson Droxipe (PER Cent BY VOLUME) IN CROPPED AND IN UNCROPPED 
Som (Oats, 1918) 
= 
Water itis 
added to | Carbon dioxide produced in 
Temper-| Atmos- | maintain 
Date ature pheric | moisture Difference 
of | (eenti- | pres- content Cropped Uncropped. (A—B) 
sampling | grade) | Sure at 30 soil soil 
(inches) per cent (A) (B) 
(grams) 
Jan. 3 TSE Oper 2OR D4. | kes. 0.3734 .020 | 0.2294. .005 0.144+ .021 
Jan. 16 TORO pH ME ZOR G4: erste): ces. 0.346+.014 | 0.162+.002 0.184+ .014 
Jan. 31 SROs Pea O noe. lies ciestc ees: 0.315+.009 | 0.223+ .006 0.092+ .011 
Feb. 7 20): 02 -\- 222720 eee oaeees 0.318+.010 | 0.226+ .002 0.092+ .010 
Feb. 11 AOR Ome 28s 98) I-05 Salon 0.340+.010 | 0.2494 .009 0.0914 .013 
Feb. 14 DPA BS S|: ate O(a eA ee 0.401.010 | 0.255+.009 0.146+ .013 
Feb. 18 SRO ZO RG leet chess 0.370+.010 | 0.221+.006 0.149+ .012 
Feb. 21 ADO? Wo Bee) 5.00 | 0.509+.014 | 0.2583 .008 0.251+ .016 
Feb. 25 20ESe Iie 28.83 3.75 | 0.445+.009 |} 0.1954: .006 0.250+.011 
Feb. 28 | 20.0° | 29.25 5.00 | 0.595+.010 | 0.240+.008 0.355+ .012 
March 4 16.0% | 29°34 5.75 | 0.695+.016 | 0.236.008 0.459+ 7018 
March 7 | 20.0° | 28.96 3.25 | 0.639+.017 | 0.2954 .007 0.344+ .018 
March 11 16.0° | 29.54 9.75 | 0.834+.010 | 0,236+ .006 0.598+ .020 
March 14 20.0° | 28.48 9.75 | 0.969+.029 |] 0.226+.006 0.743+ .029 
March 18 18.0° | 29.15 14.25 | 1.688+.027 | 0.285+ .006 1.4038+ .028 
March 21 25.0° | 28.88 19.75 | 2.290+.060 | 0.471+.012 1.819+ .062 
March 25 180° | 28.84 24.00 | 2.108+.030 | 0.259+.009 1.844+ .031 
March 28 Ze Oen |e 29e39 17.50 | 2.224+.055 | 0.319+.010 1.905 .056 
April 1 21.0° | 28.81 30.75 | 2:514+.039 | 9.331+.010 2.183+ .041 
April 4 20.0° | 29.08 27.00 | 2.314+.033 | 0.318+.006 1.996+ .034 
April 8 19.0° | 29.39 33.25 | 1.8653-.025 | 0.170+.009 1.695 .026 
April 11 ZOE 5x i 29,26 14.00 |} 3.129+.03 0.188+ .004 2.941+ .034 
April 15 DOES | 29.22 22.25 | 2.704+.072 | 0.320+.006 2.3844 .072 
April 18 24.0° | 28.88 29.75 | 2.580+.085 | 0.311+.004 2269+ .085 
April 22 21.0° | 28.68 24.25 | 2.129+.089 | 0.211+ .005 1.918+ .089 
April 25 23.52 | 29.28 15.00 | 2.678+.056 | 0.303=- .006 2.375 .057 
April 29 Dome | 28.97 38.50 | 2.418+.040 |} 0.236+.005 2.182+ .041 
May 2 Porow le e29).20 21.00 | 2.069+.046 } 0.211+.003 1.858+ .046 
May 6 23.0° | 29.07 31.00 | 3.343+.029 } 0.389+.003 2.9544 .029 
May 9 Die Omen 25293 30.25 | 2.741+.041 | 0.345+ .004 2.396+ .041 
May 13 23.0° | 28.92 24.25 | 2.643+.045 | 0.296+.004 2,.3474-.045 
May 16 Pf BS a|) PDA 21.00 | 2.753+.071 | 0.266.004 2.4874 .071 
May 20 2270%5|" 29212 23.00 | 2.600+.081 | _0.276+.004 2.324+ .081 
May 23 24.0° | 29.30 17.75 | .2.934+ .044 | 0.295+.006 2.639-4 .044 
May-27 Pilea |e 291,05 17.25 | 2.1538+.065 | 0.259+.006 1.894.+ .065 
May 30 BB Be i PAVE 16.75 | 1.518+.018 | 0.264+.005 1.254+ .018 
June 3 DOR axalpe Zoe 9 27.00 | 2.045+.011 | 0.344+.005 1.701-E .012 
June 6 PBB \| PAVE KD) 18.25 | 1.361+.015 | 0.299=-.005 1.062+.015 
June 10 ie openie2O pled: 17.75 | 1.1204-.017 |. 0.199.003 0.921+ .017 
June 13 Pil BPN VAS ATE 10.75 | 1.070+.017 |} 0.220+ .004 0.850+.018 
June 17 195° | 29.03 15.50 | 1.170+.007 | 0.271+.005 0.899+ .009 
June 20 w 240% |) 29-21 11.75 | 1.004+.009 | 0.249+ .002 0.755+ .009 
June 24 14.0° | 29.00 5.50! 0.519+.007 | 0.140+ .002 0.379+ .007 
