< 



366 HANDY-BOOK OF HUSBANDRY. 



Composition of Clover-soil once mown for hay^ and afterward left 

 for seed. 



Dried at 212"' Fahr. 



r Organic matter 5*34 



^ I Oxides of iron 607 



Alumina 451 



Carbonate of lime 751 



Magnesia 1 '27 



Potash 52 



Soda 16 



Chloride of sodium 03 



Phosphoric acid 15 



Sulphuric acid 'i<) 



'Insoluble Silicious matter 73'84 



Consisting of— Alumina 4-14 • 



Lime (in a state of silicate) 2*69 



Magnesia '68 



Potash 24 



Soda -21 



Silica 65-88 



9959 



" This soil, it will be seen, in general character resembles the 

 preceding sample ; it contains a good deal of potash and phos- 

 phoric acid, and may be presumed to be well suited to the growth 

 of clover. It contains more carbonate of lime, and is somewhat 

 lighter than the sample from the part of the field twice mown for 

 hay, and may be termed heavy calcareous clay. 



"An acre of this land, i8 inches deep, weighed, when nearly 

 dry : — 



lbs. 



Surface 6 inches 2,407,900 



Next " 2,444,200 



Third " 2,480,500 



" Or in round numbers, every 6 inches of soil weighed per acre 

 2j millions of pounds, which agrees tolerably well with the actual 

 weight per acre of the preceding soil. 



" The amount of phosphoric acid and nitrogen in each 6-inch 

 layer was determined separately as before, when the following 

 results were obtained : — 



In Dried Soil. 



1st 6 inches. 2d 6 inches. jd 6 inches. 



Percentage of phosphoric acid .. . "159 .... "166 .... "140 



Nitrogen '189 .... '134 .... 089 



Equal to ammonia 229 .... -162 .... -108 



