L. SUMMARY OF RECOMMENDATIONS 
53. Each country should estimate the annual value of the 
chestnut in comparison with the probable annual value of the re- 
placement growth on the land when chestnut is gone. Estimating 
the damage to be expected on the oaks is very difficult. The annual 
loss from death of chestnut, with some addition for oak damage, 
gives some basis for determining what steps are justified in delay- 
ing spread of the disease. It also gives a basis for determining 
the extent of the effort to be put on development of blight-resistant 
chestnuts and replacement of European chestnuts with them. 
54. The prompt development of extensive experimental plantings 
of blight-resistant chestnuts as a source of seed and scion material 
is recommended for all countries that expect to do something about 
the problem of replacing their present chestnut growth. Determining 
the best types for various regional growth conditions and having 
at hand a source of seed mother plants in advance for the larger 
replanting job that is coming later are needed. 
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