CONTRIBUTIONS FROM THE WISLEY LABORATORY. 109 



in the next year even if the growth of the trees unpruned in the first 

 season exceeds those pruned, as Table I. indicates. This suggests 

 that these too should be pruned in the season of planting. 



The difference in behaviour of the trees on different stocks gives 

 a probable explanation of the difference which has arisen in practice, 

 and shows that in the long run the advocates of leaving pruning till 

 the second year may be justified by the trees doing at least nearly 

 as well as if pruned in the season of planting if they are dealing with 

 trees on Crab stock. 



The question of the best time to prune is not dealt with here, and 

 no doubt depends greatly upon weather conditions. 



