23 



Table No. 3 shows the comparative cost per pound of nitrogen, 

 potash and phosphoric acid in its various fonns in the three grades 

 of fertiHzers. 



TABLE NO. 3 



FORMS OF ELEMENT 



Nitrogen (as nitrates) ... 



Nitrogen (organic) 



Potash (as muriate) 



Soluble phosphoric acid . . 

 Reverted phosphoric acid 

 Insoluble phosphoric acid 



This summary shows: 



(a) That the most economical fertilizer to buy is the high grade, 

 or the one valuing commercially $24.00 or over per ton. 



(b) That the purchaser of high grade fertilizer in place of low 

 grade saves 11.4 cents on every pound of nitrogen, 5.7 cents on every 

 pound of potash and 2.2 cents on every pound of phosphoric acid. 



(c) That nitrogen in medium grade fertilizers has cost 1.9 

 cents, potash .9 cent and phosphoric acid A cent per pound more 

 than in the high grade goods. 



(d) That about 52 per cent of the brands of fertilizer sold in 

 the state during the year may be classed as low and medium grades. 



