| dc.description.abstract | A laboratory investigation was carried out to assess the suitability for
irrigation purpose of 50 groundwater samples collected from different
Deep Tubewells (DTW) at different locations of Birganj upazilla of
Dinajpur district during irrigation period January-Aril 2017 most of the
water sapless were suitable for irrigation purposes based on pH, TDS,
EC, Ca, Na, K, PO4, SO4, Cl, Fe, MN and Cu content. Analyses were
included pH, EC, TDS (total dissolved solids), cations (Ca2+, Mg2+, Na+,
K+, Cu2+, Mn2+, Fe3+) and anions (HCO3
-
, SO4
2-, PO4
3- and Cl-
). Several
variables such as SAR (sodium adsorption ratio), SSP (soluble sodium
percentage), Hardness (HT), permeability index (PI), Kelly’s ratio, and
potential salinity to evaluate the suitability of groundwater for irrigation
purpose. Almost all the water samples were within the recommended pH
value for irrigation and had a great impact on crop production. 15
samples were excellent, 35 samples were good for irrigation purpose in
respect to EC. For TDS all samples except 7 samples were considered as
‘freshwater’ for irrigation. Based on SAR and SSP values, all samples
were classed as ‘excellent’ categories for irrigation. On the basis of Ca,
K, Fe and Cu, content the entire water samples can safely be used for
irrigation and would not affect the soils. Overall observation of the study
was that groundwater samples were found suitable for irrigated
agriculture with same exception. | en_US |
