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THE PEOPLE'S FARM AND STOCK CYCLOPEDIA. 



AMOUNT AND VALUE OF THE MANURIAL CONSTITUENTS CONTAINED IN ONE 

 TON OF DIFFERENT FOODS. 



Summary. We have seen how the soil was formed during 

 the countless ages of the past how from the rocks and air were 

 gathered the exact materials needed to make a soil. We have 

 seen what a wealth of material has thus been placed under 

 our feet. So great is this wealth that if the nitrogen, phos- 

 phoric acid, and potash contained in the upper twelve inches of a 

 good soil were valued at the prices charged for them in a com- 

 mercial fertilizer the soil of a farm of one hundred and sixty 

 acres would be worth about a half million dollars. 



It is the duty of the farmer to wisely husband and use thia 



