—_—— 
IFIED MANINGSEED 
F MANY YEARS, the Manning Seed Company 
has been aware of the great effect of seed origin on future productivity of forest 
plantations. In 1949 the Company embarked on a cone procurement and seed 
extraction program that would enable it to positively certify all seed sold as to its 
climatic zone and elevation of origin. 
To the tree seed users of the world, the value of such identification data is self- 
evident. It is the desire of the Manning Seed Company to make its customers fully 
conversant with the methods by which collection areas are divided, so that they can 
be easily identified. Seed purchasers can then advantageously use the data accom- 
panying all Certified Maningseed shipments. 
While it is recognized that there are many factors in addition to climate which 
affect tree seed productivity and growth, it is believed that climatic zones are the 
most readily recognized and helpful factors on which to base seed origin. Seed col- 
lected within these zones will carry, also, racial characteristics influenced by such 
factors as soil, slope, aspect and micro-climate that can be isolated and kept separate 
under MANINGSEED collection methods which are hereafter described. 
The Manning Seed Company’s major collection areas lie in Western Washington 
and Western Oregon. Following is an explanation of how this area is divided into 
seed collection zones. Alaska, British Columbia and California are divided into seed 
collection zones on a similar climatical basis. 
West of the summit of the Cascade Mountains lie the world’s best Douglas fir 
forests. Based on general climatic data, this area has been divided into nine seed 
collection regions, numbered 1 to 9 on our map, page 8. The basic climatic char- 
acteristics of each region can be broken down as follows: 
The so-called ‘‘fog-belt”” between the Coast mountain range and the Ocean, on 
the coast of Washington and Oregon, has been divided into regions 1 to 4, based 
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