J. J. Griffith 



393 



It is possible that where in field practice the application of unaffected 

 soil has been very beneficial, the affected soil has been detrimentally 

 influenced in mechanical composition. Soil B used in this pot experiment 

 did not differ much in this respect from the adjoining; unaffected soil. 



Field Experiments. 



War conditions interfered with facihties for continuing with field 

 experiments which had been commenced. The few results obtained, 

 however, agreed in most respects with those of the pot experiments. 

 But, as regards liming, the field trials indicated very clearly the necessity 

 for a much heavier dressing of lime than that found effective to restore 

 fertility in the pot experiments. (See Pot Experiment II, 4, above.) 

 With a heavy dressing of lime there appears to be a permanent improve- 

 ment. Photograph " X" shows the effect of lime persisting at the end of 

 eight years. 



