616 Report op the Department of Field Crops. 



The Utilization of Plant Food. 



It has been noticed in some eases that the peroentages of cer- 

 tain plant food compounds taken up by a crop are increased by 

 liberal manuring. This does not seem to be the case in these 

 experiments as the figures in Table IX clearly show. Neither 

 the kind nor the amount of fertilizer applied caused noticeable 

 variation in the percentages of nitrogen, phosphoric acid and 

 potash found in the tubers. 



