LUTHER BURBANK 



It is in this way alone that such diseases can 

 be thoroughly and permanently conquered. 



In some parts of the United States the sun's 

 heat is too fierce and the air too dry for fruits to 

 thrive which have been accustomed to more favor- 

 able conditions. 



For such regions varieties must be developed 

 which are low, compact growers, producing an 

 abundance of thick, leathery leaves, and fruit that 

 will not easily sunburn. Some of the Eastern 

 varieties, having become adapted to a moist cli- 

 mate, are open growers, bearing rather thin, deli- 

 cate leaves. Such varieties are usually total fail- 

 ures when introduced in the arid Southwest. 



In developing a new fruit, the plant-breeder 

 must not only meet the exacting demands of Na- 

 ture, but also the exacting and increasingly com- 

 plicated demands of the grower, the shipper, and 

 the consumer; for together they constitute the 

 jury that finally determines the value of his prod- 

 uct. The tests of these jurists are applied from 

 different standpoints and for different purposes. 



The grower is solicitous for an early-bearing, 

 prolific tree, immune to fungous diseases or insect 

 pests; one that will flourish with little care, prun- 

 ing, or other attention. 



The shipper and dealer are unconcerned about 

 the characteristics of the trees, or their produc- 



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