COMPOSITION OF SOILS. 17 



by giving an occasional dressing of good stable manure, 

 say from ten to twenty tons per acre, and bringing it into 

 play by an application of from one to two cwts. nitrate of 

 soda per acre, whilst for the pnrpose of giving colonr to 

 the fruit add one cwt. sulphate of iron every second year. 



2. COMPOSITION OF A FERTILE LOAM. 

 Selected Constituents in 100 parts. 



Surface Soil. Subsoil. 



Per cent. Per cent. 



2-59 

 41-79 

 55'15 

 0-47 

 0-88 

 0-19 



This soil, which contained a little lime intermixed with 

 the clay subsoil upon which it rested, with abundance of 

 potash and phosphoric acid, might be kept up in fertility 

 by an application of stable manure or compost, to which 

 might be added a mixture composed of 3 cwts. super- 

 phosphate of lime, 2 cwts. nitrate of soda or sulphate of 

 ammonia, and 1 cwt. sulphate of iron. 



3. COMPOSITION OF A HEAVY TENACIOUS CLAY. 



Selected Constituents in 100 parts. 



Surface Soil. Subsoil. 



Per cent. Percent. 



Organic matter . . 4'87 . . 4*80 



Clay .... 75-29 . . 78'13 



Sand .... 9-26. . 10-97 



Lime .... T15 , . 2.23 



Alkalies and magnesia . 1'37 . . 0'32 



Phosphoric acid . . 0'06 . . 0'04 



C 



