R. K. Torvi , G. S. Kariyappa , K. M. Satishchandra

Abstract

To determine the optimum spacing that gives maximum production of high est quality pulpwood in the shortest time, a spacing trial was established in Pinus tecunumanii during 1988 using 1 m × 1 m, 2 m × 2 m, 2.5 m × 2.5 m, 3 m × 3 m, 3.5 m × 3.5 m, 4 m × 4 m and 5 m × 5 m spacings. Data collected upto end of 8th year are presented in this paper. Analysis of data indicated that height was not affected by different spacing while Diameter at Breast Height (DBH) was highest at widest spacing and lowest at closest spacing. Further, Height to DBH ratio decreased with increase in spacing indicating a lower Form-Factor at wider spacing. Total Stand Volume per hectare and Mean Annual Volume Increment (Mal) were highest in 1 m × 1 m spacing and decreased with increase in spacing. In 1 m × 1 m spacing there is intense competition between trees which resulted in high mortality and thin trees producing small quantity of pulpwood whose extraction is expensive and uneconomical. In other spacings, trees are distributed in diameter classes that produce pulpwood of desirable size. Considering volume production and distribution of trees in different diameter classes, maximum production of pulpwood is anticipated at 2.5 m × 2.5 m spacing which gives a planting density of 1,600 plants per ha at the rotation period of 12 years.

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R. K. Torvi , G. S. Kariyappa , B. K. Mohamed Amanulla

Abstract

Due to inadequate and diminishing supply of bamboo. the only source oflongfibred wood. Pines with long fibres are invaluable to meet the growing needs ofthe paper industry. Tropical Pines are fast growing with better adaptability and higher productivity. The performance of Tropical Pines varies with species. provenances. climatic and site conditions. Pinus caribaea var. hondurensis. 13 Hand 4 H provenances from Queensland. Australia have been found to be best adapted and potentially most productive seed sources. Pinus oocarpa represented only by one provenance showed satisfactory rate of growth. Pinus kesiya also exhibited satisfactory growth but prevailing climatic conditions slow down/prevent it's further expansion. Prior to large scale investment in industrial plantations with Tropical Pines. it is necessary to lay-out site specific trials to find out their adaptability. suitability and productivity.

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G. S. Kariyappa , B. K. Mohamed Amanulla , R. K. Torvi

Abstract

A nursery trial of Pinus caribaea var. hondurensis with 3 pot sizes and 4 dates of sowing was conducted in the year 1992/1993. Results of the trial have indicated that growth parameters viz. shoot length, ischolar_main length and ischolar_main collar diameter etc. varied considerably with different pot sizes and time of sowing. A nursery period of about five months was found optimum for production of a planting stock of 25-30 cm height with pot size of 10 cm × 15 cm.

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K. M. Satishchandra , G. S. Kariyappa , S. Nagaraj , G. K. Shenava

Abstract

There is an ever increasing demand for long fibre forest raw material due to depletion of Bamboos by the paper industry in India. Fourteen provenances of Pinus caribaea var. hondurensis and six provenances of Pinus tecunumanii were tested in the site to find out the desirable provenances for higher and sustainable productivity. Growth parameters assessed indicated that the differences in height and dbh were not significant for the provenances of Pinus caribaea var. hondurensis while the differences were significant for the provenances of Pinus tecunumanii. Growth comparison under field conditions indicated that the site conditions are ideally suited for the growth of Pinus caribaea var. hondurensis where as they are hotter than that of native habitat for Pinus tecunumanii and hence Pinus caribaea var. hondurensis is grown on large scale and Pinus tecunumanii is considered as secondary species. 4H and 13H Queensland provinces, Mt. Pine Ridge provenance from Belize, and La Brea, Bros Laguna, Los Limones, Tierra Blanca and Culmi provenance from Honduras of Pinus caribaea var. hondurensis are desired for bigher and sustained productivity.

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B. K. Jagadish Chandra , G. S. Kariyappa , B. E. Manjunath

Abstract

Provenance trials in Eucalyptus camaldulensis were carried-out in drier tracts of Shimoga district by the Mysore Paper Mills Ltd., Shimoga. These are to find out suitable and superior provenances in Eucalyptus camaldulensis as a replacement for Eucalyptus hyhrids 14 provenances were tried in the trial at two different locations. Of the provenances tested in the trials, Emu creek, Petford. QLD, Irvine bank, QLD, Gibb river, WA, and Katherine, NT had promising growth rates under prevailing climatic and site conditions. However the performance of Eucalyptus hybrid tried as a control is also satiafactory. Results of these trails indicate that the performance of E. camnlduleflsis provenances varies considerably with the site and climatic conditions.

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