120 



HATCH EXPERIMENT STATION. 



[Jan. 



how to improve its efficiency as a complete manure under 

 varying conditions of soil as well as of varying wants of 

 crops, by adding those manurial constituents which are called 

 for in different relative proportions, and which the barn- 

 yard manure on hand does not contain. 



Analyses of Eighty Samples of Barn-yard Manure made at Am- 

 herst, Mass. 



The average barn-yard manure contains, as will be noticed 

 from the above statement, a larger percentage of nitrogen as 

 compared with potash and i)hosphoric acid than is generally 

 considered economical in a complete fertilizer for general 

 farm purposes. 



The praclice of adding to the manurial refuse materials of 

 the farm, as stable Tnanure, vegetable compost, etc., such single 

 commercial manurial substances as will enrich them in the 

 direction desirable for any particular crop, does not yet receive 

 that degree of general attention which it deserves. An addi- 

 tion of potash in the form of muriate or sulphate of potash, 

 or of phosphoric acid in the form of fine-ground South Caro- 

 lina or Florida soft p)hosphate, etc., ivill in many instances 

 not only imp)rove their general Jitness as complete manure, but 

 quite frequently permit a material reduction in the amount of 

 barn-yard manure ordinarily considered necessary to secure 

 satisfactory results. An addition of from thirty to forty 

 pounds of muriate of potash and one hundred pounds of 

 fine-ground soft Florida phosphate per ton of ])arn-yard 

 manure, at any time before applying the latter to the soil 

 deserves recommendation . 



