374 



Journal of Agricultural Research 



Vol. XII. No. 6 



fDAtj»5 OFZZ'/ MOISTURfL) 



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JULIl JUL3I AUGZ6 OCT. 50 



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 MAY 7. 



Fig. 3.— Graphs of the depressions of the freezing point in soil 5, with and without crop. 



