402 



SCIENCE PROGRESS 



normal trees. In another case there was a plantation consisting 

 of eight trees of each of 117 different varieties of apples, four 

 of each being on the crab stock and four on the paradise 

 stock. These trees had been treated in the same way till 

 they were seven years' old and then a difference was made 

 in pruning them, moderate pruning being continued with one 

 half and hard pruning adopted in the case of the rest. The 

 results of the cropping in the following season (all the varieties 

 did not bear fruit) are illustrated by the other diagrams in fig. 6 

 and bear similar evidence to that of the other experiments, 



c 

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First 

 5 Years. 



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c 

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Second 

 5 Years. 



0) 



-p 



CO 

 £- 

 0) 

 -D 

 O 



<v 



+3 



CO 



i. 

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53Vars. 80Vars. 





on 



on Crab. Paradise, 



Fig. 6. — Crops from trees pruned to different extents. 



the hard pruning having reduced the yield to one-third of the 

 normal, this being equally the case whether the trees were on 

 the paradise or crab stock. These results refer to one season 

 only (1906) but the results have been similar in every succeeding 

 year up to the present date (191 3). Of course, some instances 

 occur every year in which the hard-pruned trees yield the 

 better crops but this is probably accidental, for no one variety 

 is found to do so uniformly in successive seasons. 



The way in which fruiting is favoured by an absence of 

 pruning has received many striking illustrations at the Fruit 



