New roots on pine seedlings: Greenhouse tests with ponderosa pine seedlings indicate time of transplanting affects rooting ability of seedling
AuthorsEdward C. Stone
Gilbert H. Schubert
Authors AffiliationsEdward C. Stone is Assistant Professor of Forestry, University of California, Berkeley; Gilbert H. Schubert is Forester in the California Forest and Range Experiment Station, U.S. Forest Service, Berkeley.
Hilgardia 10(3):11-14. DOI:10.3733/ca.v010n03p11. March 1956.
Many cut-over forests in the California pine region are producing at much less than full capacity because of the practice of relying upon natural restocking by seed from the remaining trees. Some of these areas contain too few trees, some support trees of less desirable species, and some have been occupied by brush. If left as they are, many of these areas will require fifty to a hundred years before full production is achieved.
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New air powered hand duster: Use of compressed air to fluidize dusts permits treatment of 7,000 square-foot-capacity glasshouse in less than half hour
Aphid damage to alfalfa hay: Honeydew of spotted alfalfa aphid apparently not distasteful to cattle but protein and carotene in damaged hay are reduced
Woolly apple aphid control: Upward and downward migration of aphid throughout trees reduced in preliminary experiments with chemical compounds
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Control of walnut blight: Antibiotic and copper formulations tested in modified spray program in experimental plots in Sun Joaquin County
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Sodium-calcium in young citrus: Ratio of sodium to calcium in the nutrient solution of sand cultures shown to affect mineral absorption and plant growth
Trifoliate orange seedlings: Effect of various soil chemical properties on growth of trifoliate orange seedlings in sandy and in loam soils
The cyclamen mite, Tarsonemus pallidus, and its control on field strawberries