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The Bulletin 



Concisely, the average results for five years' experiments with different 

 quantities of fertilizers are as follovi's : 



RESULTS WITH CORN AT STATESVILLE. 



The experiments with corn at this fann, results of which are given in 

 Table TX, are planned on the same general basis as those with this crop 

 at the Central Farm. The data secured in the experiments is assem- 

 bled and discussed in similar manner for both farms. 



Nitrogen, IST (Plats 1, 3^ and 1). During six years the average re- 

 sults on the plats in Field A and B show decreased yields and in the 

 value of product, while for one year in Field C there was a gain from 

 the use of nitrogen, the average results for the plats in the three fields 

 being an actual loss in both yield and value of product from the appli- 

 cation of nitrogen alone. The average annual loss was $1.97 per acre 

 on basis of com and stover and $1.60 ])ev acre on basis of corn alone. 



Phosphoric Acid, P (Plats 2, 4^ and 2). Phosphoric acid alone pro- 

 duced increased jaelds in all of the seven years on the plats in the three 

 fields, the average increase for two years in Field A being 5 bushels 

 for four years, in Field B 6.5 bushels of corn per acre, and for one year 

 in Field C 7.4 bushels, or an average for seven years in all three fields 

 of 8.2 bushels, worth at 80 cents per bushel $4.96 per acre for corn 

 alone, or $5 for the increased yield of corn and stover over cost of fer- 

 tilizer. 



Potash, K (Plats 3, 62 and 3). Except the fi-rst year in Field B, 

 there was less corn produced on the plats receiving potash alone than 

 on the unfertilized plats, the average for the seven years being slightly 

 less where potash was used than where no fertilizer was applied, and the 

 potash was used at loss. 



Nitrogen and Phosphoric Acid N P (Plats 5, 7^ and 4). From nitro- 

 gen and phosphoric acid increased yields over the unfertilized plats were 

 obtained in all seven years in the three fields, the average annual in- 

 crease for two years results in Field A being 22.4 bushels of corn per 

 acre; for the four years results in Field B 17.5 bushels of com per acre; 

 and for one year in Field C 16.3 bushels, or an average the annual 

 increase for seven years results in the three fields of 18.8 bushels of 

 com worth $11.91 over cost of fertilizer for- com alone, or $16.42 for 

 the increased yield of corn and stover. This was 12.6 bushels more 

 corn, worth $10.08, than phosphoric acid alone produced, showing that 

 nitrogen has added decidedly to the yield and profit when combined with 

 phosphoric acid, though alone it was used at a loss. 



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