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profitable and even with a low yield of 0.59 & Technology, Sylhet); BEGUM, A.; BILLAH,
t/ha the benefit-cost ratio is 2.6. The major S.M. & MIAH, M.M. (Soil Science Discipline,
constraint to crop intensification in the region Khulna University, Khulna). Study on Removal of
is the delay in the harvest time of the preceding
rice crop which controls to the seeding date of Chromium and Zinc from Contaminated Soil by
chickpea and determines the water availability Washing Method. South Asian J. Agric,. 2006,
for crop growth. Being in the rainfed system, 1(2), 5-7.
the farmers have no control over the harvest
time, but research on stabilizing and advancing Heavy metal contaminated soils can be
the harvest dates is necessary for further crop
intensification and sustainable crop production. decontaminated by the washing method. Washing
method was conducted for the remidiation of
340 SALEH, A.F.M. ( Institute of Flood contaminated soil in the laboratory. Laboratory
Control and Drainage Research, Bangladesh batch extraction studies were conducted with
University of Engineering and Technology contaminated soils with Cr (VI) and Zn separately
(BUET), Dhaka); KHAN, M.A.K. & MAZID, to determine the ability of extractants such as 0.12
M.A. (Bangladesh Rice Research Institute,
Joydebpur, Gazipur). Opportunities of Dry M Na 4P 2O 7, 0.1 M NaF, 1.0 M HCl, deionized
Seeding for Drought Alleviation in Rainfed water, and EDTA solution to remove chromium
Lowland Rice Systems. IWFM Res. Bull., 2001- from varying soil pH (6.1 - 8.2), organic matter
2002, 3, 62-70. content (1.57% - 1.83%) and clay content (10% -
17%). Up to 71 % of total chromium and 61% of
In South Asia, 15%-66% of the arable land is zinc using 0.12M Na 4P 2O 7 could be removed from
under rainfed agriculture, where rice is the the contaminated soil.
predominant crop. Uncertainty and variability of
rainfall, in time, amount and frequency have
significantly affected the rice production. Studies 342 BEGUM, A. (Soil Science Discipline,
on rainfed rice systems in Northwest Bangladesh Khulna University, Khulna); HUSSAIN, M.S.
have shown that with the traditional technology of (UGC, Agargaon, Sher-e-Banglanagar, Dhaka) &
crop establishment by transplantation, droughts are ULLAH, S.M. (Dept. of Soil, Water and
expected at the beginning of the crop season during
transplanting and near the end of the season during Environment, Dhaka University, Dhaka). A Study
flowering and ripening of the grains. Opportunities of Pedological and Edaphological Aspects of the
for drought alleviation through dry seeding Manpura Island in Coastal area of Bangladesh.
technology of crop establishment have been South Asian J. Agric., 2006, 1(2), 84-91.
studied during the 1994-2000 wet seasons, by
carrying out field experiments and farmers'
surveys. From comparative analysis of water A study was conducted to find out the pedological
availability from rainfall and relative water supply, and edaphological aspects of Manpura island
the dry seeding technology has been affirmed as during December, 1994. Five soil profiles were
technically mere feasible for drought alleviation, studied from the selected locations of the Manpura
but the socio-economic constraints limiting its island for pedological aspects. Texture of the soils
adoption by the farmers need further research.
of Manpura is predominantly loamy with an
631.4 : AGRICULTURE : SOIL average content of 51% silt and 21% clay and are
SCIENCE very productive with mild alkaline reactions.
Sand/silt ratio remains more or less constant with
depth which indicates the uniform nature of parent
341 ALAM, J.B. (Civil & Environmental materials, although there are signs of stratification.
Engineering Dept., Shahjalal University of Science
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