HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Curlin, J. W. Search for Related Content PubMed Articles by Curlin, J. W. Agricola Articles by Curlin, J. W.

Response of Natural Stands of Shortleaf Pine to Thinning and Fertilization With Nitrogen and Phosphorus¹

ABSTRACT

This paper reports the results of fertilizer experiments conducted with thinned and unthinned natural stands of shortleaf pine. Nitrogen and phosphorus were applied singly and in combination on both thinned and unthinned plots. The plots were located on three soil series found in close association in the Great Valley Region of eastern Tennessee.

Four-year response in basal area growth per tree was increased as much as 300% over the unthinned check by thinning and application of nitrogen. An increase of up to 40% over the thinned check was achieved with nitrogen alone. These responses were still evident 4 years after fertilization. Basal area growth response to phosphorus was erratic throughout the study period.

The results indicate that stand density must be low enough at the time of nitrogen application to allow growth to proceed unhindered.

¹ Contribution of the Division of Forestry Development, Tennessee Valley Authority, Norris, Tenn.

² Staff Forester, Forestry Analysis and Planning Staff. The author recognizes W. H. Cummings and F. E. Blow who were instrumental in planning and conducting these studies.

Received for publication May 16, 1962. Accepted for publication August 6, 1962.