Table lo Composition of some fertilizing substances 



Fertilizer 



Composition 



Inorganic; 



Colloidal phosphate. 



Di calcium phosphate. 

 Li mate. ..... o.. .o. o « 



Ldme marl„ . . . . . . . . . . 



Limestone. .. ....... . 



Rhenania phosphate. . 

 Superphosphate.. ... 



Thomas meal ........ . 



, .... 2$% CaOj 2U% P2O5; 11% SiOg^ h% 



Fe2035 small amounts of Mn, Mg., Clj 



Fl, Cr, ?a and Na 

 . .... }>% P2O5J 2% CaO 

 . .... h%% CaO| 32^ MgO 

 . . . o , 80 to 90^ CaC03 

 , . . . . 90 to 9% CaC03 

 , .... 2$% PjO^j 1|2^ CaO 

 , .... 16 to 20^ P2O5; CaSO[^^ small amounts 



of AI5 Sij Fe, Mg, and Fl 

 , .... 13 to 20% P205^UO to S0% Ca05 8 t;^ 



9% Fe 



Organic; 



Cottonseed meal,. 



Sheep manure ..... 

 Shrimp bran. ..... 



Soybean meal. ... . 



Timothy hay. .................... ..-, 



Aquatic plants >, GsN ratios (see Meehean, 1935) 

 Ceratophyllum dermersum . ..... 2 2 „ 8 s 1 



=""" ^ '■ ..... 18,6;1 



..... 12.3sl 



h.0% protein^ 1% nitrogenj 3% P2O51 



2% K2O 



2% Nj 2% K2OJ 1% P2O5J low in proteins 



53^ organic matterj \xh% protein; 1% 

 N (exclusive of NO3) j 2% P 



6\% total organic matter; hh% protein.; 

 2U^ N (exclusive of NO3) ; 1% P 



0.8^ N; OM KoO; 0.2^ P2O5 



Ceratophylli 



Potampg^tcn americanus 

 P. filliformis. ...... 



13 



