456 



STATE BOARD OF AGRICULTURE. 



SUMMARY OF RESULTS OF INSPECTION. 



In reviewing the foregoing summary we find 94,7 per cent of the 

 samples analyzed containing amounts of plant-food equal in value to 

 that guaranteed and 77.2 per cent of the samples containing amounts of 

 plant-food 5 per cent or more in excess of that guaranteed. Only 1.8 per 

 cent of the samples analyzed show a deficiency of 5 per cent in the value 

 of the plant-food guaranteed. Three samples, all from one company, 

 show a deficiency of 10 per cent in the value of the plant-food guaranteed. 



These facts indicate that the manufacturers, as a whole, are endeavor- 

 ing to fulfill their guarantees as to the amount and value of the plant- 

 food supplied in the fertilizers sold in Michigan. 



QUALITY OP PLANT FOOD. 



It is again necessary to call attention to the quality of the nitrogen 

 supplied in many of the fertilizers and to urge a careful study of the 

 tables which follow, in order to determine what brands furnish the 

 larger part of the nitrogen in those forms which are recognized as being 

 more or less readily available. In interpreting these results, the follow- 



