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BANGLADESH JOURNAL OF FOREST SCIENCE

A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute

ISSN - Print: 1021-3279 | Online: -
Abstract:

Pigeon pea grows as a perennial plant,
but is cultivated as an annual or biennial
crop. It is a much branching woody
shrub and grows to a height of four meters.
The branches spread upto two meters.
The flowering period varies from 65 to
200 days, the early selected cultivars generally
maturing in 120-130 days. Arhar is a tropical crop and most
adapted to drought conditions. Soil fertility
not being a limiting factor, it can be
grown on marginal to low fertility land
(Gowda and Kaul 1982). Due to the ageold
system of cultivation, less than a ton
of Arhar seeds per hectare is available
from about 3600 ha of land -under Arhar

Abstract:

In Bangladesh, natural resources add a
considerable amount of revenue and thus
have a direct effect on socio-economic condition
of the country. Calamus spp. (Cane)
are among those natural resources, the
demand of which are increasing gradually
both in home and abroad. The species
are used as raw-materials for furniture
industry, binding materials and other novelty
items. So far very little attention was
given for proper management of the
Seeds of Calamus species take one to species. Due to over exploitation, this valuable
resource is now almost threatened. It
grows sporadically in the forest areas of
Sylhet, Chittagong, Chittagong Hill Tracts,
Cox’s Bazar and in the village groves in
general. The present deteriorating condition
of the genus demands immediate
attention to save it from extinction.

Abstract:

The Sundarbans mangrove forest within
Bangladesh territory is managed under
selection system with natural regeneration
(Chowdhury 1968; Khattak 1979). A large
part of the forest is unproductive. There
are non-commeicial cover (N. C. C.) as
well as barren areas. Seven percent of the
area was devoid of forest cover (Anon.
1960). Another report (Anon. 1985), however,
states this figure to be 2%.
N. O. O. areas are composed of raised
lands or depressions which have become
unsuitable for natural regeneration with
mangrove species. Consequently, there are
potentialities for improvement of the land

Abstract:

Pigeon pea (Cajanus cajan), commonly
known as Arhar, is a tropical crop. It is
planted in flat and hilly lands, on field
bunds or as hedges. With proper time of
planting at ideal conditions, population
ranges from 5,00,000-6,50,000 plants per
hectare (Gowda and Kaul 1982). Arhar
has a multipurpose use. The juice of the
young leaves is used as a medicine for the
treatment of jaundice (Nadkarni 1954).
Green seed is used as a vegetable. As the
stem does not require splitting and since
it dries very quickly, the plant is very
popular as fuel to the villagers. Other
advantages of Arhar cultivation include
conservation and nitrogen enrichment of
the soil (Alim 1985).

Abstract:

Rattan is one of the most important
forest produce next to timber. Dransfield
(1974) reported that the most widespread
taxon is the genus Calamus which is
distributed from West Africa to Fiji and
from South China to Queensland. It is
the largest genus of rattan. However, comparatively little scientific attention has
been paid to its cultivation and management.
In Bangladesh, Calamus viminalis
Willd. var. fasciculatus Becc. grows in abundance
as undergrowth in the natural forest
(Banik and Nabi 1979). Effects of transplanting
and spacing on plantations of

Abstract:

Malt extract agar (MA) and potato
dextrose agar (PDA) are two fungal
culture media, widely used in pathological
studies. In Bangladesh, during 1984-85
Difco malt extiact was sold at Tk. 3,000-
4,000 (US $ 9Q-120)/kg and chemical grade
dextrose at Tk. 300-400 (US$ 9-12)/kg,
thus making both of these items very costly.

Malt extract is prepared from the soluble
extracts of sprouted cereals such as
barley, wheat, rye, oat, corn or rice and
contains about 80% carbohydrate (Anon.
1979). Sugarcane gur is produced in
Bangladesh from juice obtained by crushing
sugarcane stems and is available in all
local markets throughout the year at about

Abstract:

Forest inventory in Bangladesh was
studied by Anon (1960), Slavicky (1978),
Choudhury and Chowdhury (1983) and
others. The literature concludes that
Choudhury ‘and Chowdhury (1983) gave a
mathematical formulation for volume-age
relationship.
This paper considers mathematical formulation
of forest inventory. Firstly, definitions
of some mathematical notations
used in this paper are given. Subsequently,
some fundamental terminology of forest •
inventory are treated. Attempts have been
made to prove some text-book results from
the mathematical point of view and to
workout a mathematical definition of the
time of felling of a tree. Finally, some

Abstract:

Members of Loranthaceae are stem
parasites of wide range of hosts. An extensive
list of the hosts of the members of
South-Indian Loranthaceae were given by
Fischer (1926) and another list was given
by De (1941). A long list of the host
plants for Dendrophthoe falcata (Linn, f.)
Etting. has been provided by Singh (1962).
This list was further up-dated by Johri and
Bhatnagar (1972). Records for the hosts
of other broad-leaf species of Loranthaceae
are rather scanty. Macrosolen cochinchinensis
(Lour.) Van Tiegh. is distributed from
tropical Himalayas and Nepal to Bangladesh
and attacks a large number of plants.
About 20 hosts have hitherto been reported
for M. cochinchinensis (Fischer 1926, Kanjilal
et al. 1940, De 1941, Sinclair 1955,
Greenham and Hawksworth 1964 and
Ganguly and Pal 1975).

Abstract:

There are many substitutes of wood
such as, plastic, nylon and metal for the
manufacture of rifle butt ; but wood is
preferentially used for its special characteristics.
Walnut is the best known wood
species throughout the world for the purpose
because of its superiority of specific
properties over other species. This species
is not available in our country and, as such,
Bangladesh Ordnance Factories (BOF) were
dependant on the imported Chinese Walnut
(Juglans regid) till 1981 for the manufacture
of wooden parts of the rifle. In
1982, Chickrassy was introduced as an
alternative to Walnut on the basis of limited
tests conducted at BOF. Since this

Abstract:

Necessities of investigators with diverse
interests in fungi have led to the formulation
of new, and modifications of existing
media to buit the specific need of the
researchers during the past. Thus, 185 fungal
culture media have been listed by Booth
(1971). T..ao (1970) has reviewed a large
number of selective media and stressed the
increasing need for evolving more and more

selective media. Most of the selective
media so far evolved have dealt with the
isolation of fungi from soil. Only a very
small number of media deal with the isolation
of fungi from infected plant parts.
Rahman (1982) reported Sclerophoma
pythiophila (Cda.) Hohn to be the most
common associates of Ramichloridium pini
de Hoog and Rahman. During isolation

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