Feb. II, 1918 Freezing-Point Method and Soil Solution 



375 



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 JULH JUL31 AU0Z8 



OCT. 50 



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 DLC 26 



40WKS 

 FEb 19 



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 MAY 7. PLA\NTlN<j 



Fig. 4. — Graphs of the depressioas of the freezing point in soil 6, with and without crop. 

 27809°— 18 6 



