Artificial induction of in situ aerial roots and rhizomes at the branch bases on the culms of Bambusa balcooa, B. nutans, B. polymorpha, B.vulgaris and Dendrocalamus giganteus was found possible by culmtop chopping and emerging culm removal treatments. Thin-walled bamboo, such as Melocanna baccifera did not respond to these treatments.

Such, aerially rooted and rhizomed branches were used as cuttings. Formation of active roots and rhizomes from these cuttings was significantly higher (60-93%) inside a fibre glass tent without mist than those placed in the open intermittent mist bed (0-7%).

Kraft pulping, in spite of its wide practice, suffers from some serious disadvantages, such as the odour problems, lower pulp yield and high investment requirements. To overcome these difficulties considerable efforts have already been made. In this paper, feasibilities of alternative methods to kraft pulping have been examined and discussed.

A kraft mill, even by utilizing the best available technology, cannot be made completely odour-free. However, there are several sulphide-free and non-sulphur pulping methods. Among these, sodaanthraquinone (AQ) pulping process seems to be promissing.

The most practised chemical to-day is the kraft process. 95% of the present production of chemical 74 Pulp yield can be increased by using polysulphide, H2S or AQ in the cook. The first two are used exclusively in kfraft cooking, and so the odour problem cannot be overcome. AQ on the other hand, is also suitable in a sulphur-free cook which eliminates the odour problem of the pulp mill. Soda-AQ pulping is more suitable with hardwoods.

There is an ample opportunity of reducing the investment cost in a kraft mill by replacing the conventional recovery furnace with alternative devices now under development or by eliminating some of the steps in the recovery cycle. There are also possibilities of eliminating the causticizing step and the lime kiln in any alkaline pulping process by replacing NaOH with disodium borate in cooking or by introduction of TiO₂, Fe₂O or ilmenite (FcO. TiO₂) in the recovery stage.

Seedlings of Pinus caribaea var. hondurensis planted at Keochia Silvicultural Research Station, Chittagong in 1972 reached an average height of 14.0 m and started bearing fruits in 1982. The trees flowered during the months of January- February and cones ripened in August- September of the same year. Some seeds were hand-picked from two selected trees in 1982 and the seeds were extracted from the cones by exposing them in the sun. Germination experiment was carried out with them. The seeds were first tested by floatation process with 85% ethyl alcohol for finding out the empty seeds. After the test, 220 mature seeds were sown in polybags filled up with forest top soil. An appropriate quantity of chemical fertilizer was also applied. The tops of the bags was filled up with mycorrhizal soil collected from pine plantation. Out of 220 seeds 97 seeds germinated (44%). The growth rate was fair in the nursery and in the field their performance was encouraging. 70 seedlings out of 97 germinated ultimately survived (72%).