CONTENTS. 



Peculiarities of growth in the blueberry plant — Continued. 

 Peculiarities of nutrition — Continued. 



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A method o 



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193 



From the evidence at hand the presumption is that the mycor- 

 rhizal fungus of the swamp blueberry transsforms the nonavail- 

 able nitrogen of peaty soils into a form of nitrogen available 

 for the nourishment of the blueberry plant 48 



It is possible that the mycorrhizal fungus of the swamp blue- 

 berry transforms the free nitrogen of the atmosphere into a 

 form of nitrogen suited to the use of the blueberry plant 48 



pot culture 51 



Seeds of the swamp blueberry sown in August from fresli berries 

 germinate in about 5 weeks 51 



The seedlings are first transplanted at the age of about 6 weeks, 



when they are approaching an inch in height 54 



When about 10 weeks old and nearly 2 inches in height the 

 seedlings begin to send out basal branches 57 



When the seedlings are about 4 months old and about 3 inches 

 in height the growth of the original stem terminates 58 



When the plants are about 5 months old and 4 to 6 inches in 

 height they are potted in 4-inch pots in the best peat or peat 

 mixture - - - 59 



Blueberry plants potted in peat may be made to grow more rap- 

 idly if they are watered occasionally during the growing season 

 with water from a manure pit 62 



Pots containing blueberry plants should be plunged in sand or 

 other material that will furnish constant moisture and good 

 aeration 65 



Plants of the swamp blueberry sometimes lay down flowering 

 buds at the age of 7 months 67 



In the spring after the danger of frost was past the plants were 

 repotted and placed out of doors, in half shade, plunged in 

 sand 67 



By the use of the cultural methods already described, seedlings 

 of the swamp blueberry have been grown into robust plants 

 of a maximum height of 27 inches at 12 months from germi- 

 nation 68 



The flowering buds of the blueberry are produced l)y the trans- 

 formation of dormant leaf buds in the latter part of the season . 71 



At the end of their first year 70 per cent of the blueberry plants 

 had laid down flowering buds for the next spring's blossoming. 73 



Plants of the swamp blueberry are exceedingly hardy and pass 

 the winter in good condition outdoors when the soil is covered 

 merely with an oak-leaf mulch, but when not exposed to out- 

 door conditions they do not begin their growth in spring in a 

 normal manner 74 



Dormant plants make their early spring twig growth before new 

 roots begin to develop 76 



Unless pollinated by an outside agency, such as insects, the 

 flowers produce little or no fruit 76 



The fruit matures about 2 months after the flowering 78 



So far as observed, the swamp blueberry when grown in acid 

 soils is little subject to fungous diseases or insect pests 79 



