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Effect of fertilizer and weed control on stem form and average taper in plantation grown pines

, : Effect of fertilizer and weed control on stem form and average taper in plantation grown pines. Australian Forest Research 11(3-4): 209-222

The basic shape of tree boles can be characterized by 2 measures, form and average taper. Evidence is presented to show that fertilization of Pinus radiata at the time of 1st thinning may have a significant effect on stem form because relative diameters in the central portion of the stem are increased by fertilization. Larger growth responses obtained by fertilizing P. radiata or P. elliottii at establishment may be accompanied by changes in average taper diameter/height. Such changes are partially confounded with the growth response. By studying the change in average taper as tree size increases with age it is shown that average taper depends not only on tree size but also on establishment practices. By comparing trees of similar size (e.g., diameter) but different ages, it is shown that the average taper of fertilized trees may be significantly greater than control trees. In P. radiata a similar effect was obtained with weed control, achieved by either weedicides or cultivation.

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Related references

Snowdon, P.W.ring, H.1; Woollons, R., 1981: Effect of fertilizer and weed control on stem form and average taper in plantation-grown pines Pinus radiata, Pinus elliottii. Australian forest research 11(3-4): 209-221

Wodzicki, T.; Polakowska, M.W.tkowska-Zuk, L.R.kiewicz, J., 1970: Weed control in plantation of pine by means of herbicides. 1. effect of 2,4-D, 2,4,5-T and MCPA applied during the active growth of pines

Berry, A.B., 1965: Effect of heavy thinning on the stem form of plantation-grown red pine. A 13-year-old red pine plantation was thinned from an original spacing of 7 x 7 feet to 14 x 14 feet to determine the effect on growth and form. In the following 19 years the trees in the thinned stand had much greater diameter growth at all measu...

Medhurst, J.L.; Pinkard, E.A.; Beadle, C.L.; Worledge, D., 2003: Growth and stem form responses of plantation-grown Acacia melanoxylon (R. Br.) to form pruning and nurse-crop thinning. This study investigated the feasibility of silvicultural intervention in Acacia melanoxylon (R. Br.) plantations grown with Pinus radiata (D. Don) nurse crops, to improve stem form and growth rate. The objective of the study was to evaluate silvic...

Wolff Von Wulfing, H.E., 1933: Stem form and volume of plantation-grown teak. This work describes the methods of preparing general volume tables for teak, on the basis of 3757 measured trees, including investigation of the correlation of various form quotients and form factors. Statistical tests of errors in measurement of...

Shelbourne, C.J.A., 1963: Growth rates, stem form and branching characteristics of five provenances of P. khasya grown under plantation conditions in N. Rhodesia. Data presented here suggest that Madagascar, Benguet and Dalat sources of Pinus khasya are suitable for Central African plantations.

Bluhm, A., A.; Garber, S., M.; Hibbs, D., E., 2007: Taper equation and volume tables for plantation-grown red alder. A taper equation and associated tables are presented for red alder (Alnus rubra Bong.) trees grown in plantations. The data were gathered from variable-density experimental plantations throughout the Pacific Northwest. Diameter inside bark along t...

Ningre, F.; Cluzeau, C.; Goff, N. le, 1992: Stem forking of plantation-grown ash: causes, results and control. Observations were made in 1985-90 in a young (13 yr old in 1990) ash [Fraxinus excelsior] plantation growing at Reichstett near Strasbourg, France. In 1990, only 30% of trees had no forking. Tree density was relatively high in the plantation - 250...

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