BULLETIN E/ 



Mean amounts recovered 



From the lower section of the table it is evident that only a 

 slight, if any, change in the relation of the HCO 3 and Cl has 

 been produced by using different amounts of manure. 



AMOUNTS OF SALTS RECOVERED FROM MANURED SOILS BY COX- 

 TIXUOUS PERCOLATION". 



Near the close of January, 1904, 206 days after applying 

 the manure to the soil, samples of the Janesville Loam and of 

 the Norfolk Sand, to which manure had been applied at the 

 rate of 200 tons per acre, were packed in the fresh, moist con- 

 dition about Pasteur niters, inside the perforated cylinders de- 

 scribed in Bulletin "B," p. 81.* In this condition distilled 

 water was caused to flow slowly but continuously through lay- 

 ers of these soils 3-16 of an inch thick, until 6000 c, c. had been 

 collected. As these soils had never been dried, the rate of per- 

 colation soon became very slow in the Janesville Loam and it 

 required nearly 36 hours to get the 6 liters of water through 

 this soil. The pressure on the Norfolk Sand was maintained 

 low enough so that the same amount of time was required in 

 collecting the 6000 c. c. of solution from it. 



*Bureau of Soils. "B," Amounts of Plant Food Readily Recoverable from 

 Field Soils with Distilled Water. 



