PLATE III. 



Peas and sorghum grown in water extract of soil scraped 

 from area fertilized with dried blood. The extract contained 

 manganese equivalent to 203 p. p. m. of manganese sulphate. 



Treatments for figs. 1 and 2 : 



(1) Tap water. 



(2) Distilled water. 



(3) Soil extract untreated. 



(4) Distillate from soil extract. 



(5) Soil extract concentrated, made to volume with distilled 

 water. 



(6) Soil extract concentrated, made to volume with tap 

 water. 



(7) Soil extract ashed, dissolved, made to volume with dis- 

 tilled water. 



(8) Soil extract ashed, dissolved, made to volume with tap 

 Trater. 



(9) Soil extract treated with two gms. calcium carbonate per 

 liter. 



