PROPER COMPOSITION OF FERTILIZERS. 17 



i *^ATid what has been said with regard to fruit-tree fertilizers ap- 

 plies with equal force to vegetable growing." 



I NEW HAMPSHIRE. 1894.. 



Farm-Yard Manures and Artificial Fertilizers — By G. H. Whitcher. 

 Bulletin No. 21. 



Under the heading of "Substitutes for Farm-Yard Manures," the 

 Director has the following remarks to make : 



i' "The results of all our work show, without exception, that New 

 Mantpshire soils are more in need of potash than any other element 

 of plant-food, and consequently that we may so compound our fer- 

 lilizers that better results shall follow their use than is possible with 

 the average fertilizer found in our markets, and this the farmer is 

 enabled to do by buying his crude fertilizing chemicals and mixing as 

 his soils and crops require .... 



"These results represent more than 500 individual tests, and it 

 cannot be that the results thus obtained are accidental; they rest on 

 some law, and from a study of the conditions of the experiments \ye 

 are brought to the conclusion that the prepared goods are deficient in 

 potash. The following table shows the per cents of nitrogen, phos- 

 phoric acid and potash in the combinations of chemicals that in actual 

 practice have proved best : 



NITROGEN. PHOS. ACIU. POTASH. 

 Per cent. Per cent. Per cent. 



Best results on plots at Hanover come from 



mixtures containing. 2.5 5.75 25.0 



Best results on seven New Hampshire farms 



>■ (husked corn). .;... .; 4.7 9'0 io-7 



Best results on seven New Hampshire farms 

 (fodder) 



Best results on Potatoes 



Best results on Sweet Corn 



Best results on Ensilage 



Best results on Potatoes, (second series) 



Average composition of mixtures of chemi- 

 cals that have produced best results 



Average composition of fertilizers sold in the 



state 3-0 12.0 3.0 



As a result of the experiments several standard combinations and 

 mixtures are recommended for the various crops and in speaking of 

 the chemicals to be used in supplying the fertilizers. Prof. Whitcher 

 says: "These chemicals are all dry, harmless substances, as easily mixed 



