184 



FUNDAMENTALS OF FRUIT PRODUCTION 



that "the conditions for the initiation of floral primordia and even bloom- 

 ing are probably different from those accompanying fruit setting." In 

 fact, recent work by Murneek^^ shows that the conditions favoring fruit 



Fig. 22. — Nitrogen, phosphorus and starch contents of bearing apple spurs compared. 

 The arrow indicates the season when fruit bud differentiation would occur in non-bearing 

 spurs. {After Eooker>^^) 



setting in apples are quite different from those determining fruit bud 

 differentiation. (2) Different parts of a plant may act quite indepen- 

 dently of one another, depending on the local factors affecting them. 



1 1 



Fig. 23. — Nitrogen, phosphorus and starch contents of non-bearing apples purs compared. 

 The arrow indicates the season of fruit bud differentiation. (After Hooker. ^'">) 



Influence of the Nitrate Supply. — When the nitrate supply was varied 

 in Kraus and Kraj^bill's experiments the amount of carbohydrate utilization 

 varied with it, in accordance with the nutritive relation between carbo- 



