2^2 Bulletin 261. 



It is evident from the above table that on this soil and for this 

 crop, the various fertilizing elements, when applied singly or in combina- 

 tions of two, did not, during the latter seasons, attain their maximum 

 efficiency. While it is likely that in some cases phosphorus was added 

 in too large amounts for the most profitable returns, yet the fact seems 

 beyond question that nitrogen, phosphorus and potassium must be added 

 in combination in order to obtain the best results. As stated before, the 

 relative amounts of the elements applied is an important matter as regards 

 this particular soil. 



RESULTS WITH FERTILIZERS STATED IN TERMS OF MONEY 



The net gain from the use of the various fertilizing materials, stated in 

 terms of money, may be seen by examining Table VIII. For the years 1905 

 and 1906, these figures are based on the values given to the different 

 fertilizers in Bulletins 232 and 241 of this Station, which contain the two 

 previous reports on this test. Acid phosphate was valued at Yz cent a 

 pound or $10.00 per ton, nitrate of soda at 2\ cents a pound or $45.00 

 per ton, muriate of potash at 2 cents a pound or $40.00 per ton, farm 

 manure at 50 cents per ton. The hay for these two years was valued at 

 $10.60 per ton. For the year 1907, the valuations given to the fertilizers 

 and hay were such as prevailed in New York State for that year; acid 

 phosphate was valued at .7 cents a pound or $14.00 per ton; nitrate of 

 soda was valued at 2.8 cents a pound or $56.00 per ton ; muriate of potash 

 was valued at 2.3 cents a pound or $46.00 per ton ; farm manure was 

 valued at 50 cents per ton. The average selling price for timothy 

 hay in New York State for December 1907, was about $14.50 per ton; 

 this valuation was used in making the calculations for 1907. 



In both 1906 and 1907, in every case, the increase in hay was worth 

 more than the cost of the fertilizers applied. The value of the total 

 increase for the three crops was in every case greater than the cost of the 

 fertilizers. This total net gain for the three crops varied from $7.34 per 

 acre when acid phosphate alone was applied to $84.59 P^'' acre when 

 twenty tons of farm manure were applied. Ten tons of farm manure 

 per acre gave a net gain of $50.62. Aside from the farm manure, the 

 largest net gain for the three years has been produced when three hundred 

 and twenty pounds of acid phosphate, three hundred and twenty pounds 

 of nitrate of soda and eighty pounds of muriate of potash were applied 

 per acre, producing in one case $40.76 and in another $35.21 per acre. It 

 will be noticed that in 1905 there was a loss of 50 cents per acre when 

 mineral fertilizers alone were applied and a loss of $i.oj per acre when 



