21 



47.8 pounds more nitrogen and 100 pounds more actual potash than 

 does a ton of the low grade goods. 



(2). That a ton of the average high grade fertilizer furnishes 

 32.8 pounds more nitrogen and 40.8 pounds more potash than does a 

 ton of the medium grade goods. 



(3). That with a 30.7 per cent advance in price over the low 

 grade fertilizer, the high grade furnishes about 76 per cent increase in 

 available plant food. 



(4). The average high grade fertilizer, with about 15.6 per 

 cent advance in price over the medium grade goods, furnishes over 

 21.7 per cent more plant food and 37.3 per cent increase in commer- 

 cial value, 



(5). The percentage activity of total nitrogen was found to 

 be 8.62, and the percentage activity of the organic nitrogen was 10.31 

 per cent more in the high grade fertilizer than in the low grade brands. 



(6). When compared with the previous year it is found that 

 the percentage activity of the organic nitrogen in the high grade 

 brands shows an improvement. In case of the medium and low grade 

 goods it is not quite up to the average of the preceding year. 



Table showing the comparative cost per pound of nitrogen, pot- 

 ash and phosphoric acid in its various forms in the three grades of 

 fertilizers. 



FORMS OF ELEMENT 



Low Grade 

 Fertilizer 



Medium Grade 

 Fertilizer 



High Grade 

 Fertilizer 



Nitrogen (as nitrates and ammoniates) 



Nitrogen (organic) 



Potash (as muriate) 



Soluble phosphoric acid 



Reverted phosphoric acid 



Insoluble phosphoric acid 



33.3 

 39.3 

 8.1 

 9.1 

 8.1 

 4.0 



26.6 



31.5 



6.5 



7.2 

 6.5 

 3.2 



22.4 cts. 

 26.5 



5.4 



6.1 



5.4 

 2.7 



This summary shows: 



(1). The most economical fertilizer to buy is the "high grade" 

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



(2). The purchaser of high grade fertilizers in place of low 

 grade would save 11.9 cents on every pound of nitrogen and nearly 

 3 cents on every pound of potash and phosphoric acid. 



(3). Nitrogen in medium grade fertilizers has cost 4.6 cents 

 and potash and phosphoric acid 1 cent per pound more than in high 

 grade goods. 



(4). About 49.5 per cent of the brands of fertilizers sold in 

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



