336 



Journal of Agricultural Research voi. xii, no.6 



Fig. 3. — Graphs of the nutrients extracted from soil 4 by varying the ratios of soil to water. Calculated to 



parts per milUon of dry soil. 



Fig. 4. — Graphs of the nutrients extracted from soil 5 by varying the ratios of soil to water. Calculated to 



parts per million of dry soil. 



