Douglas-fir fertilizer trials in Humboldt County
AuthorsR. F. Krohn
J. A. Rydelius
T. M. Little
Authors AffiliationsRobert F. Krohn is Farm Advisor, Humboldt County; James A. Rydelius is Research Forester, Simpson Timber Co., Arcata; Thomas M. Little is Extension Biometrician, University of California, Riverside.
Hilgardia 25(1):12-13. DOI:10.3733/ca.v025n01p12. January 1971.
TENS OF THOUSANDS of acres of young Douglas-fir trees grow on good soils in Humboldt County. Most areas developed on previously logged areas and are between 5 and 25 years of age. Growth rates and stocking in these stands is generally good. Age class distribution on private land in the county is considerably out of balance, however, and faster growth in some areas would help maintain a steady supply of marketable size trees for forest products raw materials. The possibility of nitrogen fertilizer raising the rate of production for a long enough period to yield a satisfactory return on the investment, would give forest owners a very important tool.
Also in this issue:A bibliography of the fig
Agriculture and the water subsidy myth
Clam shell insect sampler allows absolute insect population estimates
Weed control in asparagus direct-seeded under semi-arid conditions
Streptomycin vs. copper for controlling fireblight of pear in California, 1970
Comfrey as a feed for swine
Relationship of navel orangeworm moths to hard shell and soft shell almonds
Identification of odors from cattle feed lots
Systemic fungicides for control of fusarium corm rot of gladiolus