Summary
Progress towards the introduction of crop-logging as a management tool is illustrated by the development of multiple regression equations relating basal area increment to various stand parameters including foliar phosphorus levels. Mixed mode regression analysis was used, removing foliar P variables first and adding other variables stepwise. The model which best described the relationships sought was of the form:
where B = average annual basal area increment for the three-year period preceding or subsequent to foliar sampling; P = percentage phosphorus in foliage; BA = basal area standing at the time of sampling; SI = site index, defined as predominant height (predicted or actual) in feet at age 25 years; and Age = age of plantation in years at time of sampling.
Using this equation, the critical level of phosphorus in slash pine (Pinus elliottii Engelm.) is set at 0.075–0.080 per cent and in loblolly pine (P. taeda L.) at 0.095–0.105 per cent. Critical level is here defined as the foliar P concentration associated with 90 per cent of maximum basal area increment. Over the range of parameters examined, the critical levels so determined are, for all practical purposes, independent of age, site index and stand density.
Utilization of critical foliar nutrient levels in crop-logging requires a know-ledge of fertilizer — soil — plant interactions which can be derived in part from the fertilizer trials used to establish critical levels in the first instance.
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References
Bevege, D. I., Some aspects of girth and basal area development of slash pine and their significance to the management of evenaged plantations in south-east Queensland. B. Sc. For HonoursThesis, Univ. of Qld., 46 pp. (1965).
Cain, J. C., Plant tissue analysis. Part 1. Some factors in sampling and analysis for the diagnosis of nutritional status of trees.In Mineral Nutrition of Trees, Duke Univ. School of Forestry Bull. No.15, pp. 55–62 (1959).
Gentle, S. W. and Humphreys, F. R., Experience with phosphatic fertilizers in man-made forests ofPinus radiata in New South Wales. FAO World Symposium on Man-made Forests and Their Industrial Significance. Canberra, 37 pp. (1967).
Gessel, S. P., Stoate, T. N. and Turnbull, K. J., The growth behaviour of Douglas-fir with nitrogeous fertilizer in western Washington. 2nd. Rept Coll. For. Resources Univ. Wash. Seattle, 119 pp. (1969).
Gregg, J. V., Hossell, C. H. and Richardson, J. T., Mathematical trend curves: an aid to forecasting. Imperial Chemical Industries Monograph No. 1 Oliver and Boyd, 99 pp. (1964).
Macy, P., The quantitative mineral nutrient requirements of plants. Plant Physiol.11, 749–764 (1936).
Mott, D. G., The analysis of determination in population systems.In Systems Analysis in Ecology,ed. K. E. F. Watt. Academic Press, pp. 179–194 (1966).
Pritchett, W. L., Progress in the development of techniques and standards for soil and foliar diagnosis of phosphorus deficiency in slash pine.In Forest Fertilization-Theory and Practice. Tennessee Valley Authority, Muscle Shoals, Ala., pp. 81–87. (1968).
Richards, B. N. and Bevege, D. I., Critical foliage concentrations of nitrogen and phosphorus as a guide to the underplanting ofAraucaria toPinus. Plant and Soil31, 328–336 (1969).
Richards, B. N. and Bevege, D. I., Principles and practice of foliar analysis as a basis for crop-logging in pine plantations. I. Basic considerations. Plant and Soil,36, 000–000 (1972).
Tamm, C. O., Determination of nutrient requirements of forest stands. Intern. Rev. For. Research1, 115–170.
Watt, K. E. F., Ecology and Resource Management. McGraw-Hill, 450 pp. (1968).
Young, H. E., The response of loblolly and slash pines to phosphate manures. Queensland J. Agr. Sci.5, 77–105.
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Bevege, D.I., Richards, B.N. Principles and practice of foliar analysis as a basis for crop-logging in pine plantations. Plant Soil 37, 159–169 (1972). https://doi.org/10.1007/BF01578488
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DOI: https://doi.org/10.1007/BF01578488