154 



On the Composition of Waters of Land-Drainofje. 



Table IV. — Fourth Series. Drainage-' 



Composition of Drainage-Water from Plots; 



Broadbalk Field, Rothamsted ; Wheat; 



Manures stated in Quantities per Acre ; Constituents; 



SOPEBrHOSPHATB AND SUUHATE OP POTASH, SODA, AND MaGXESIA. 



Per Gallon. 



Unmanurcd 



every Year. \ ^^j^j^^^^ 



Ammomac;il- , 



j salts. j 



And 200 lbs. 

 Ammonia- 

 salts 

 (■II lbs. 

 Nitrogen). 



And 400 lbs. 

 Ammonia- 

 salts 

 (82 lbs. 

 Nitrogen). 



And 600 lbs. 

 Ammonia- 

 salts 

 (123 lbs. 

 Nitrogen). 



A,nd 550 lbs. 



N itrate of 



Soda 



(*-2 lbs. 



Nitrogen). 



Flots3&4. 



Orjxanic matter 

 Oxide of iron . . 

 Pliosphoric acid 



Lime 



Magnesia .. 

 Potash 



*Soda 



Chlorine . . 

 Sulphm-ic acid . . 

 Nitric acid 

 Carbonic acid . . 

 Soluble silica .. 



Plot 6. 



Plot 6. 



Plot 7. 



Plot 8. 



Plot 9. 



•40 



•20 



•063 



•04 



•54 



•21 



•75 



•73 



•43 



•51 



•83 



•10 



10 



•01 



•35 



75 

 69 

 43 

 57 

 02 

 67 

 74 

 77 

 85 



Total solid residue! 

 per gallon (dried > 

 at 260'" Fahr.) ..) 



Ammonia .. 



14^15 



18-852 



22^803 



23 • 654 



26-802 



47 '85 



faint trace none 



traces 



•007 



