MANURE, YIELD AND SOLUBLE SALTS IN SOILS. 



29 



Amounts of nitrio acid (NOj ) in field soils receiving different 

 amounts of manure. 



From this table it will be seen that there has been no clearly 

 and strongly marked tendency for all the manured soils to 

 show more nitrates than the same soils otherwise treated. The 

 mean values for all soils stand as given in the next table. 



