1^2 



BOARD OF AGRICULTURE. 



phosphoric acid (with sulphuric acid and lime) supplied 

 in proi^ortions contained in a crop of 48-50 bushels, nitro- 

 gen in one-third, two-thirds, and full amount contained in 

 same crop. , 



The field devoted to this experiment is divided into twenty 

 plats, each containing one-tenth of an acre. Each plat is 

 thirty-five rods and three feet long and seven and one-half 

 feet wide. The plats are made so long and narrow to more 

 certainly eliminate the inequalities of the soil. 



A complete fertilizer furnishes to the crop all the mineral 

 ing-redients and the nitroiren required for its growth. ]\Iany 

 soils lack only one or two of these. The farmer who sup- 

 plies one or two more than are needed wastes his money. 

 He who would feed his crop intelligently must learn from 



