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Notes: Prediction of Mid-Term from Short-Term Fertilizer Responses for Southern Pine Plantations

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For nitrogen (N), phosphorus (P), and N + P fertilization, models are presented for predicting 5- and 8-year volume responses from 2- and 5-year responses. The r² ranges from 0.51 to 0.85. Extrapolations over 3 years are more precise than over 6. Prediction of 5-year response is more precise for N and N + P than for P. Prediction of 8-year response is more precise for N + P than for N or P. Inclusion of site and stand conditions as additional independent variables increases the R² to the range 0.61 to 0.92. Conditions significantly affecting continuing response include initial nutrient levels, growth rate, and drainage class. Forest Sci. 30:264-269.
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Keywords: Nitrogen; forest soils; loblolly pine; phosphorus

Document Type: Miscellaneous

Affiliations: Former Data Analyst, North Carolina State Forest Fertilization Cooperative, School of Forest Resources, N.C. State University, Raleigh, N.C.

Publication date: 1984-03-01

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.

    2016 Impact Factor: 1.782 (Rank 17/64 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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