EFFECTS OF FERTILI2ERS OX SOEGHUM. 163 



An inspection of the analysis of the soil shows it to be exceptional 

 in its verv small content of lime, and in the almost entire absence of 

 chlorine. It is, in fact, a gravelly soil, which has been highly culti- 

 vated, and verv considerably changed in its character. Its need seems 

 chieflv to be the addition of sulphate of lime ("land plaster," or 

 gypsum). 



Upon plat A there was applied : 



13 pounds of kainite, 

 c>}i " ammoniuTii sulphate, 



116 " calcium sulpliate. 



Upon plat B there was applied : 



21 pounds of potassium sulphate, 

 104 " calcium sulphate. 



Upon plat C there was applied : 



50 pounds of superphosphate, 

 104 " calcium sulphate. 



Upon plat D there was applied : 



50 pounds of bone meal. 

 104 " calcium sulphate. 



The above amounts are equal to an application per acre as follows : 



Pint A: 



87 pounds kainite, 

 .S7 " ammonium sulphate, 

 774 " calcium sulphate. 



Plat B: 



175 pounds potassium sulphate, 

 867 " calcium sulphate. 



Plate: 



417 pounds superphosphate, 

 867 " calcium sulphate. 



PlatD: 



417 pounds bone meal, 



867 " calcium sulphate. 



AXALTSIS OF FERTILIZERS TSED UPOX SORGHUM PLAT. 

 Superphosphate of lime: 



Per cent. 



Soluble phosphoric acid 9 77 



Insoluble phosphoric acid 3 G.3 



Rtfverted phosphoric acid fi9 



Nitrogeu (=N H 3 2 .45 per cent) 2 02 



Commercial kainite: 



Per cent. 



Potassium sulphate 24 74 



Soiiium sulphate 18 92 



Sodium chloride 15 .54 



