Pacific Southwest Research Station

Publication Information

Title: Germination and survival of douglas-fir in northern California ... effects of time of seeding, soil type, and aspect

Author: Strothmann, Rudolph O.

Date: 1971

Source: Res. Note PSW-RN-245. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p

Station ID: RN-PSW-245

Description: For best results, direct-seeding of Douglas-fir in northern California should be done in November or December. In trials on two National Forests, sowing in those months resulted in significantly more seedlings than sowing in February or March. Also, more seedlings became established on fine-textured red soils than on coarser gray-brown soils. On red soils, more seedlings developed on south aspects; on gray-brown soils, more developed on north aspects. Some seeds particularly on spring sown plots-did not germinate until the second growing season.

Key Words: Pseudotsuga menziesii, regeneration (artificial), California (northwestern), direct-seeding, seedling survival, loam soils, aspect, seeding date

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Strothmann, Rudolph O.   1971.  Germination and survival of douglas-fir in northern California ... effects of time of seeding, soil type, and aspect  Res. Note PSW-RN-245. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p.