Figure 6. (a) A typical single-row windbreak of black locust, 

 (b) A single-row windbreak of Lombardy poplar. 



of western yellow or Scotch pine to the leeward of the poplars serves to make 

 the shelter more permanent and of greater value in winter. 



Selection and Care of Stock. One-year-old seedlings of black locust from 

 12 to 14 inches tall, and one-year rooted cuttings of the poplars, are most 

 desirable for general planting. They are listed by nurserymen as forest tree 

 seedlings, and can usually be procured more cheaply, including cost of trans- 

 portation, from nurseries in the Middle West than at Pacific Coast points. 

 Such trees of the best quality should not cost more than $5.00 a thousand, 

 and they give better satisfaction than older and more expensive stock. Oleaster 

 and pine seedlings are more expensive. Pines that have been transplanted 

 once or twice are preferable and cost from $15.00 to $20.00 a thousand. 



Planting should be done as early in the spring as water is available for 

 irrigation, and not later than May 15. Fall and early winter planting is not 

 desirable as the trees are liable to injury from drought and from the attack 

 of rabbits. 



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