1896.] 



PUBLIC DOCUMENT — No. 33. 



129 



per acre and potash-magnesia sulphate at the rate of 390 



pounds per acre. 



Cost per Ton. 



Phosphatic slag, $15 00 



Mona guano (West Indies), 15 00 



Florida rock phosphate, 15 00 



South Cai'olina phospliate (floats), 15 00 



Dissolved bone-black, 25 00 



Analyses of Phosphates used. 



[I., phosphatic slag; II., Mona guano ; III., Florida phosphate ; IV., South Carolina 

 phosphate ; V., dissolved bone-black.] 



The following fertilizer mixtures have been applied annu- 

 ally, from 1890 to 1894, to all the plats, with the exception 

 of Plat 3, which received in 1890 ground apatite and in 

 1891 no phosphate whatever, on account of the failure of 

 securing in time apatite suitable for the trial. 



Annual Supply of Manurial Substances. 



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 feet), 



{ 



Groimd phosphatic slag. 

 Nitrate of soda, . 

 Potash-magnesia sulphate, 

 Ground Mona guano, . 

 Nitrate of soda, 

 Potash-magnesia sulphate, 

 Ground Florida phosphate, 

 Nitrate of soda, . 

 Potash-magnesia sulphate, 

 South Carolina phosphate. 

 Nitrate of soda. 

 Potash-magnesia sulphate, 

 Dissolved bone-black, . 

 Nitrate of soda, . 

 Potash-magnesia sulphate, 



127 



43 



58 

 128 



431 



59 

 129 



44 



59 

 131 



44i 



60 



78 



45 



61 



