112 



Report of the Chemist of the 



4. Relation of Plant-Food Supplied to That Removed by the 



Two Crops. 

 In the table below we have indicated the amounts of nitrogen, 

 phosphoric acid, and potash applied to each plot and have also 

 calculated the amounts removed by the crop during each of the 

 two years. The amounts of plant-food removed by the crops 

 from plot No, 1, which received no fertilizer, can be regarded as 

 representing the quantity of plant-food in the soil available, un- 

 der the conditions present, for the potato crop. In discussing 

 the results presented we shall consider each form of plant-food 

 by itself, summarizing the detailed results. 



Table Showing Amounts of Plant-Food Supplied and Used During two 



Years. 



