POT EXPERIMENTS WITH FERTILIZERS. 



159 



fescue there were three pots in each group, in the other experi- 

 ments there were four. One group in each series included the 

 pots with mineral fertilizers only, one group with the one-third, 

 one with the two-thirds, and one with the full nitrogen ration 

 in addition to the minerals. The results from each group were 

 averaged together. The details of the experiments and the 

 discussion of the results follow. 



EXPERIMENT WITH MEADOW FESCUE GRASS. 



This experiment included pots Nos. i to 12. Three pots 

 were used in each group, but the crop on one of the pots with 

 mineral fertilizers was accidentally destroyed. The results of 

 the experiment are given in Table 77. 



Table 77. 



Nitrogen in fertilizer and in crop in pot experime?it ivith 

 meadow fescue grass, ipoi. 



The growth on the different pots in the same group was 

 fairly uniform, but for the different groups there was quite a 

 wide variation both in the total amount of crop and in percent- 

 ages of nitrogen in the crop. The increase in crop and in 



