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Notes: Fertilization Increases Cone Production in a 55-year-old Ponderosa Pine Stand in Central Arizona

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Female flowering and number of cones in ponderosa pine were linearly related to urea ammonium phosphate application. A rate of 1,121 kg/ha produced about four times as many cones as controls; 560 kg/ha produced twice as many as controls. Fertilizer had no effect on male flower production. Increased cone production seems to be related to inherent ability to flower and heavy fertilizer application. Forest Sci. 30:1079-1083.

Keywords: Pinus ponderosa; flowering; nutrition; seed production

Document Type: Miscellaneous

Affiliations: Research Plant Physiologist at Rocky Mountain Forest and Range Experiment Station, USDA Forest Service, Forestry Sciences Laboratory, Northern Arizona University, Flagstaff, AZ 86001

Publication date: 1984-12-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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