son, SESSION. 



TIT 



application of 3:20 pounds acid phosphate and 260 pounds muriate of 

 potash, the cost of the total application being raised to $26.90 for each 

 rotation. The results arc shown in table IX. 



IX. -AVERAGE TOTAL YIELD AND INOKEASE PER ACRE FROM COMPLETE FER- 

 TILIZER WITH LARGER AMOUNT OF NITRATE OF SODA. 



The aggregate value of the increase from this fertilizer amounts 

 to $44.28, or a little more than from the smaller applications, but the 

 additional cost of the fertilizer is so much greater that the net gain is 

 reduced to $17.38. It appears, therefore, that the dressing of 160 pounds 

 of nitrate of soda per acre, or one pound per square rod, repeated three 

 times in the course of a 5-year rotation, has not been excessive, but has, 

 in fact, given a larger net gain than either a smaller or a larger 

 quantity. 



For more convenient comparison the results for the last 7 years are 

 summarized in table X. 



X. -SUMMARY OF TABLES II TO IX. 



Fertilizers per acre. 



Kind. 



Quan- 

 tity. 



Cost. 



Value of in- 

 crease. 



Total. 



Net. 



Acid phosphate. 



Acid phosphate.. . 

 Muriate of potasli. 



Acid pliosphate. 

 Nitrate of soda . 



Acid phosphate... 

 Muriate of potasli 

 Nitrate of soda... 



Acid phosphate 



Muriate of potash. 

 Nitrate of soda ... 



Acid phosphate... 

 Muriate of potash. 

 Nitrate of soda .. . 



$15 80 



17 18 



20 84 



21 57 



21 32 

 17 43 



Next to nitrogen, potassium has been the most expensive element 

 of the fertilizer. If we compare the increase from acid phosphate alone 



