668 BOARD OF AGRICULTURE. 



The following tabular statement of our field results for 

 three succeeding years needs scarcely any further explana- 

 tion. The beneficial influence of a potash supply on the 

 yield of fodder, upon our experimental plats, is in every 

 instance unmistakable ; while the application of a liberal 

 supply of phosphoric acid and nitrogen, either separately or 

 combined, on the whole, does not materially aflcct the an- 

 nual yield, when compared with the unfertilized plats. 



The investigation will be continued, with some modifica- 

 tions, to serve as an illustration concerning the cifect of a 

 one-sided exhaustion of farm lands, and to assist in pointing 

 out some practical lessons for an economical management of 

 the latter. 



