38o 



Journal of Agricultural Research 



Vol. XII. No. 6 



Table III. — Observed and calculated freezing-point depressions — Continued 



July 17. 



July 31- 

 Aug. 28 

 Oct. 30 . 

 Dec. 26 

 Feb. 19 

 May 7. . 



July 17. 



July 31- 

 Aug. 28 . 

 Oct. 30. 

 Dec. 26. 

 Feb. 19. 

 May 7 . . 



July 17. 

 July 31- 



Aug. 28 

 Oct. 30 

 Dec, 26 

 Feb, 19 

 May 7. 



July 10. 

 July 2r4. 

 Aug. 21 

 Oct, 23 

 Dec. 18 

 Feb. 12 

 May 7. 



July 10. 

 July 24. 

 Aug. 21 

 Oct. 23 

 Dec. 18 

 Feb. 12 

 May I . 



Moisture. 



Soil 



SA. 



P. ct. 

 16. 2 

 18.4 

 21. 9 

 16.8 

 18.2 

 18. I 

 16,9 



Soil 

 6A. 



23-4 

 24. I 



24- 5 

 24.8 

 23.0 



Soil 

 7A. 



12.5 



Soil 



8A. 



13.2 

 14. I 



15-9 

 9.9 



12. 7 



10. 6 



Soil 



sB. 



p. ct. 



18. 7 



20. 6 



21. I 



17- 5 

 18.0 

 17. 2 



19. 2 



Soil 

 6B. 



23.8 

 25.2 

 24.9 

 24.4 

 24.8 

 25. o 

 22. 6 



0-399 



Soil 

 7B. 



15-9 

 16. 9 

 16.6 

 13-6 

 14.7 

 14. o 

 12.8 



Soil 

 SB. 



Soil 

 9A. 



14-3 

 14. o 

 16. 9 



10. 7 



11. o 



9.4 

 7-1 



Soii 

 9B. 



13-4 

 13.2 



13- I 



9-7 



10. 6 



9-5 

 6.9 



observed 



freezing-point 



depression. 



Soil 



sA. 



" C. 

 0.093 

 029 

 017 

 079 

 066 

 106 

 079 



Soil 

 6A. 



. 040 

 .068 

 .085 

 .066 

 . 104 



Soil 

 7A. 



0.028 

 . 026 

 . 007 

 .082 

 .038 



•053 

 . 070 



Soil 



SA. 



038 



015 

 , 021 

 , 060 

 ,049 

 ,062 

 , 122 



Soil 

 9A. 



O. OI6 

 . 007 

 • 014 

 .028 

 .031 

 •057 

 .118 



Soil 

 sB. 



C. 



o. 069 



• 039 



• 157 

 .088 



. 106 



.115 



. lOI 



Soil 

 6B. 



097 

 086 

 072 



lOI 



103 

 126 

 153 



Soil 



7B. 



o. 048 

 . 042 



• 03s 



• 151 

 . 108 



• 093 

 . 116 



Soil 

 SB. 



o. 064 



•053 

 .056 



.138 

 . Ill 



•135 

 . 214 



Soil 

 9B. 



0.034 

 . 026 

 . 042 

 . 092 

 .058 

 .087 

 . 200 



Osmotic 



pressure (atmos 

 pheres). 



Soil 



sA. 



Soil 

 sB. 



0.83 



•4:7 



Soil 



6A. 



4. til 



.82 

 I. 02 



.80 

 I. 26 



Soil 

 7A. 



0.34 



32 



Soil 

 6B. 



I. 17 



I- OS 

 .86 

 I. 22 

 1-25 

 1-52 

 1.85 



Soil 

 7B. 



0.58 



■ 50 



.42 



1.82 



1-31 

 I- 13 

 I. 41 



Soil 



8A. 



o.'46 



. 18 

 •25 

 •72 

 •59 



•74 



1.47 



Soil 

 SB. 



0.77 

 .64 

 .68 

 1.56 

 1-34 

 1-52 

 2.58 



Soil 



9A. 



Soil 

 9B. 



0. 41 



• 32 



• 50 



1. II 



.70 



1. OS 



2. 41 



Calculated total 



solids in soil 



solution. 



Soil 5A. 



P. p.m. 



2,900 

 900 

 500 



2,500 



2, 100 



2,500 



Soil 

 6A. 



12, 000 



1,300 

 2, 100 

 2, 700 

 2, 100 

 3,300 



Soil 



7A. 



900 



800 



200 



2, 600 



I, 200 



1, 700 



2, 200 



Soil 5B. 



P. p.m. 

 2, 200 

 I, 200 

 4,900 

 2,800 

 3i30o 

 3,600 

 3,200 



Soil 

 63. 



3,000 

 2, 700 

 2, 300 

 3,200 

 3,200 

 3>900 

 4, 800 



Soil 

 7B. 



1,500 

 1,300 



1, 100 

 4,700 

 3,400 



2, 900 

 3,600 



Soil 



SA. 



I, 200 

 500 

 700 

 I, 900 

 I, 500 

 1,900 

 3,800 



Soil 

 9A. 



600 

 200 



400 

 900 



I, 000 

 I, 800 

 3,700 



Soil 

 SB. 



2, 000 

 I, 700 

 I, 800 

 4,300 

 3,400 

 4, 200 

 6, 700 



Soil 

 9B. 



1, 100 

 800 



1,300 



2, 900 

 I, 800 

 2,700 

 6,300 



Freezing-point 

 depression cal- 

 culated to uni- 

 form moisture. 



Soil 



sA. 



"C. 



033 

 017 

 017 



033 

 038 

 060 

 034 



Soil 

 5B. 



Soil 

 6A. 



Soil 

 7A. 



o. 020 



.018 



. 009 



.066 



• 034 



. 041 

 . 041 



Soil 

 8A. 



o. 027 

 . oia 

 . 019 

 . 027 



•033 

 • 032 



•039 



Soil 

 9A. 



014 

 005 

 014 

 012 

 014 

 018 

 012 



'C. 

 o. 044 



•033 

 . 141 

 .044 



•059 

 •054 

 . 070 



Soil 

 6B. 



Soil 

 7B. 



0.043 

 . 042 

 •034 

 . 194 

 .085 

 .068 

 , 072 



Soil 

 SB. 



o. 051 

 .044 

 .051 

 . 064 



•073 

 . 071 

 . 071 



Soil 

 9B. 



o. 023 

 . 017 

 . 027 



.031 



. 024 



.028 



. 016 



