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A field experiment was done at SAU Farm, in winter(10 Nov. 2004-07
Mar.2005)to investigate the effect of vermicompost and NPK
(Nitorgen+Phosphorous+Potassium) on the growth, chemical
composition and yield of wheat. The experimental soil was silty
clay, pH 6.0. The treatments were 4 levels of vermicomposts viz. V0
(0 t ha-1), V1 (1 t ha-1), V2 (2 t ha-1), V3 (3 t ha-1), and 4
levels of fertilizers viz. F0 = (0-0-0 kg ha-1), F1 = low (40-30-20
kg ha-1), F2 = medium (80-60-40 kg ha-1), F3 = high (120-80-60 kg
ha-1) of N-P2O5-K2O with 16 treatments combinations and 3
replications. The results showed that with increasing the doses of
vermicomposts and fertilizers increased grain and straw yield
significantly up to a level. The maximum significant grain and
straw yields were obtained with the treatment combinations V3F2 or
V2F3. The highest doses of vermicompost and chemical fertilizers
increased N, P, K and S concentrations in wheat plant significant
at different stages of plant growth and also enhanced N, P, K and S
uptake significantly at the ripening stage. Chemical fertilizers
failed to increase organic matter in post harvest soil, but
vermicomposts showed a significant positive res
In coastal area interactions among air, water and soil take place.
The nature of water and amplitude of the tidal regimes resulted in
the poor understanding.The present study focused on a segment of
the coastal zone of Bangladesh. Soils collected from the three
islands were found to be rather similar as regard to chemical
properties, although some variables differed significantly among
the islands. No general pattern of significant variation was found
location wise. Element concentrations of leaves of Sonneratia
apetala showed significant variations among the islands. In most
cases, location 2 of the river Buragauranga had higher values of
the variables. Among the phytoplankton genera, 8 belong to class
Bacillaiophyceae. Dominant phytoplankton was Trachelomonas sp. and
was found in all three locations. Phytoplankton diversity was high
in location 2. Principal component analysis (PCA) showed that
Trachelomonas sp. has negative significant correlation with
principal component one but have positive relation with
Coscinodiscus sp. This book will help in understanding the coastal
zone as holistic approaches have been taken and help in
conservation and management of coastal resources.
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