122 



BOARD OF AGRICULTURE. 



These tables may serve as a basis on wliich to calculate the 

 amount of nitrogen, potassa, and phosphoric acid, contained 

 in the crop in any particular instance. 



Such a course of operation cannot secure the highest yield 

 ■which the lands under cultivation are capable of producing. 

 Our steady aim must be to enrich the soil again with ready 

 plant-food, keeping always in mind that the latter represents 

 the capital put on interest. 



Large? crops are not always a proof of a judicious manage- 

 ment ; they may render the father comfortable at the expense 

 of the son ; for experience almost everywhere teaches that it 



the report of the United States Department of Agi'iculture, for the year 1871. Cal- 

 culated from Wolff's tables, by C. Wellington, gi-aduate of Mass. Ag'l College : — 



I. For the Seed. 



II. For the Straw or Stalks. 



///. For the Entire Plant. 



