Large & Small Dressings of Nitrate of8oda, with Minerals. 171 



number of species, and a considerably greater percentage by 

 weight, of those belonging to the leguminous and miscel- 

 laneous orders. 



TABLE XLI. AVERAGE PER ACRE PER ANNUM, BY 275LB. NITRATE 

 OF SODA, WITH MIXED MINERAL MANURE CONTAINING POTASH ; 

 PLOT 16. 



Average per Acre per Annum. 



With a greater number of species, possessing different 

 habits of growth, there is a higher percentage of lime, an 

 equal percentage of magnesia, a considerably higher per- 

 centage of potash and phosphoric acid, a higher percentage 

 of sulphuric acid, about an equal percentage of chlorine and 

 of silica, but considerably less of soda, in the dry substance 

 of the produce grown by the smaller amount of nitrate of 

 soda. And, reckoned per acre, there is very nearly as much 



