76 REPORT OF THE COMMISSIONER OF AGRICULTURE. 



mal conditions of soil, rainfall, &c., the commercial and agricultural 

 values should correspond reasonably well, but under other than proper 

 conditions the agricultural value must be chiefly determined by experi- 

 ment. 



That the purchaser may be able to estimate the commercial value of 

 a fertilizer from the results of an analysis a table of trade values is here 

 api^ended. It is tahen from the repoj-t of the Connecticut Agricultural 

 Experiment Station for 1879, j). 18, and applies to the >7e\v York mar 

 kets. It seems to be a very just statement of the value of those ingre- 

 dients known to be of fertilizing value. 



Trade-values for 1879 and 1880. 

 Connecticut Agricultural Experiment Station : 



Ceiifs per pound. 

 Nitrogen in nitrates 26 



Nitrogen in ammonia Baits 22^ 



Nitrogen in Peruvian guano, fine steamed l»one, dried and fine ground blood, meat, 



andfisli .' 20 



Nitrogen in fine ground "bone, liorn, and wool dust 18 



Nitrogen in fine medium bono 17^ 



Nitrogen in medium bone lOi 



Nitrogen in coarse medium bono l"'i 



Nitrogen in coarse bone, born sbavings, bair, and fisb scrap If) 



Pbosphoric acid, soluble in water 12^ 



Pbosplioric acid, "reverted," and in Peruvian guano 9 



Phosphoric acid, " insoluble," in fine bone and fish guano 7 



Phosphoric acid, "insoluble," iu fine medium bono i'>i 



Phosphoric acid, "insoluble," in medium bone (> 



Phosphoric acid, " insoluble," in coarse medium bone 5| 



Phosphoric acid, " insoluble," in coarse bone, bone ash, and bone black 5 



Phosphoric acid, " insoluble," in fine ground rock phosphate 3i 



Potash in high grade sulphate 7^ 



Potash in low grade sulphate and kainite 



Potash in muriate or potassium chloride ........ 4^ 



The following values for 1879-1880 have been adopted by the Com- 

 missioner of Agriculture of the State of Georgia: 



Georgia trade-values for 1879-1880. 



Cents per ponnd. 



Soluble and reverted phosphoric acid, called "available phosphoric acid" 12^ 



Ammonia 1^ 



Potash 8 



No value is given to insoluble phosphoric acid, and no distinctions are 

 made between actual and potential ammonia. The mechanical condi- 

 tion of the fertilizer is not recognized as affecting its value. The prices 

 are for Savannah, Georgia. 



In applying these prices multiply the per cent, of each valuable ingre- 

 dient by its price per j)ound, and this result by twenty. The product 

 represents the value of each ingredient in a ton (2,000 i)ounds) of the 

 fertilizer. 



Accurate experiments are still needed to ascertain the value, if any, ot 

 insoluble phosphoric acid, the comparative fertilizing values of soluble 

 and reverted phosphoric acid, and the comparative values of sulphate 

 and chloride ("muriate") of potash. It is hoped that the government 

 may provide means for the careful investigation of these very important 

 questions, the final settlement of which would have a real and great 

 money value to the farmers of this country. 



