388 



Journal of Agricultural Research 



Vol. XII, No. 6 



Table VII. 



-Comparison of total solids in soil solution as calculated by freezing-point 

 and extraction methods 



Date. 



Nov. 15 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Dec. 21 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Dec. 27 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Feb. 12 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Soil 

 No. 



4A 



4B 



5A 



sB 



6A 



6B 



7A 



7B 



12A 



12B 



14A 



14B 



lA 



iB 



2A 



2B 



3A 



3B 



8A 



8B 



9A 



9B 



loA 



loB 



iiA 



iiB 



4A 



4B 



SA 



5B 



6A 



6B 



7A 



7B 



12A 



12B 



14A 



14B 



lA 



iB 



2A 



2B 



3A 



3B 



8A 



SB 



9A 



9B 



loA 



loB 



iiA 



iiB 



Total 

 mois- 

 ture. 



Per d. 



17-3 

 16. 7 

 16.8 



17-5 

 24 

 24 

 14 



13 

 14 



11. 4 



17-5 



16. 2 



23-4 

 22.3 

 20. 4 

 20. o 

 20. 9 



20. 7 



12. 7 

 12. s 



11. o 



10. 6 



15- I 

 14. 6 



14-5 

 13.6 



19-3 

 18.0 

 18.2 

 18.0 



24- 5 

 24.8 



15- 9 

 14.7 

 13-9 



12. 7 



17. o 



16. 5 

 22. 7 



21. 7 

 20. 2 

 20. 2 

 20. 6 

 19.9 

 10. 6 

 10.8 



9.4 



9-5 

 14. I 



13-4 

 13-5 



Free 

 water. 



Per d. 

 4-3 

 3 

 3 

 4 

 6 

 6 

 8 



7 

 10. 



7 



10. 

 8 



5 

 4 

 7 

 7 



Freezing- 

 point de- 

 pression. 



C. 



068 



082 



079 



088 



068 



lOI 



082 

 151 



061 



138 



033 

 095 

 037 

 095 

 047 

 087 

 048 



060 



049 



III 



031 

 058 



046 



079 

 047 

 134 

 055 



121 

 066 

 106 

 085 

 103 

 038 

 108 

 030 

 059 

 039 

 068 

 056 

 108 

 056 

 lOI 

 062 

 120 

 062 

 135 

 057 

 087 

 066 



125 

 065 



Concen- 

 tration of 



total 

 dissolved 



solids 

 calculated 



from 

 freezing- 

 point de- 

 pression. 



P.p. 



100 

 600 

 500 

 800 

 100 

 200 

 600 

 700 

 900 

 300 

 000 

 000 

 200 

 000 

 500 

 700 

 500 

 900 

 500 

 500 

 000 

 800 

 400 

 500 

 500 

 200 

 700 

 800 

 100 

 300 

 700 

 200 

 200 

 400 

 900 

 800 

 200 

 100 

 700 

 400 

 700 

 200 

 900 

 800 

 900 

 200 

 800 

 700 

 100 

 900 

 000 

 200 



Concen- 

 tration of 



total 

 dissolved 



solids 

 calculated 



from 

 extracts 

 to free 

 water. 



P. p. m. 

 10, 000 



000 



500 

 900 

 900 

 900 

 400 

 400 

 500 

 800 

 800 

 300 

 800 

 400 

 800 

 300 

 200 

 600 

 200 

 500 

 700 

 200 

 800 

 700 

 600 

 600 

 300 

 800 

 700 

 300 

 100 

 100 

 700 

 800 

 400 

 300 

 400 

 800 

 800 

 700 

 700 

 600 

 300 

 100 

 800 

 900 

 600 

 100 

 900 

 400 

 900 

 300 



Total 

 dissolved 

 solids in 

 100 grams 

 of moist 

 soil cal- 

 cixlated 



from 

 freezing- 

 point de- 

 pression. 



Gm. 



O. 009 

 . 010 

 . 010 



•013 

 .013 

 . 021 

 .023 

 .036 

 . 020 

 .032 

 . 010 

 . 026 

 . 006 

 .013 

 . on 

 . 019 

 . 010 



.013 

 .013 



.030 



• 005 



.008 



. 010 

 . 017 



.013 

 .032 



. on 

 . 019 

 . on 

 . 017 

 .018 

 .023 

 . 012 

 .030 

 . 009 

 . 014 

 . on 

 . 019 

 . 007 

 . on 

 . 012 

 .023 



•013 

 . 026 



■013 

 . 029 

 . 006 

 . 009 

 .013 

 . 021 

 .015 

 .032 



Total 

 sissolved 

 solids in 

 100 grams 

 of moist 

 soil cal- 

 culated 



from 

 extracts. 



Gm. 

 0.043 



•055 

 . 029 

 . 040 

 .031 

 . 046 

 .030 



• 049 

 . 016 

 .036 

 .028 



•055 

 . 026 



•053 

 . 021 

 .044 

 . 029 

 .038 

 .028 

 . 064 

 . 019 

 . 029 

 . 020 

 .038 

 .031 



• 050 



• 052 

 .074 

 . 040 

 . 067 

 . 042 

 . 072 

 . 027 

 .068 

 . 024 



■033 

 .032 



•043 

 •045 

 . 069 

 .049 

 •055 

 •03s 

 . 042 



• 032 



•054 

 . 029 



•039 

 .030 

 .051 

 .036 

 . 062 



