1899.] 



PUBLIC DOCUMENT — No. 33. 



129 



namely, phosphatic slag, Mona guano, Florida phosphate, 

 South Carolina phosphate (floats) and dissolved bone-black. 

 The market cost of each of these articles controlled the 

 quantity applied, for each plat received the same money 

 value in its particular kind of phosphate. 



Analyses of Phosphates used. 



[I., phosphatic flag; II., Mona guano; III., Florida phosphate; IV., South Carolina phos- 

 phate; v., dissolved bone-blacli.] 



The following fertilizer mixtures have been applied an- 

 nually to all the plats, with the exception of Plat 3, which 

 received in 1890 ground apatite and in 1891 no phosphate 

 whatever : — 



Plats. 



Annual Supply of Manurial Substances. 



Pounds. 



Plat 1 (south, 6,494 square feet). 

 Plat 2 (6,.565 square feet). 

 Plat 3 (6,636 square feet) , 

 Plat 4 (6,707 square feet), 

 Plat 5 (6,778 square feel). 



Ground phosphatic slag, 

 Nitrate of eocfa. 

 Potash-magnesia sulphate. 



Ground Mona guano. 

 Nitrate of soda, 

 Potash-magnesia sulphate. 



Ground Florida phosphate, 

 Nitrate of soda, 

 Potash-magnesia sulphate. 



South ( 'urolina phosphate. 

 Nitrate of soda, 

 Potash-magnesiii suli>hutc, 



Dissolved bone-black, 

 Nitrate of soda. 

 Potash-magnesia sulphate. 



127 

 43 



58 



128 

 43i 

 69 



129 

 44 

 59 



131 

 444 

 60 



78 

 45 

 61 



