TY - JOUR 
AU - Md. Shahadat Hossain
AU - GKM Mustafizur Rahman
AU - Md. Saiful Alam
AU - HA Mashuk
AU - Md. Mizanur Rahman
TI - Empirical model and variability of soil salinity in the coastal zone of Bangladesh
JO - Eurasian Journal of Soil Science
VL - 8
IS - 2
PB - Federation of Eurasian Soil Science Societies 
SN - 2147-4249 
UR - http://ejss.fesss.org/10.18393/541344
DO - 10.18393/541344
SP , EP - 144 - 151
KW  -  Geostatistics, electrical conductivity, map, relationship, soil property. 
PY  - 2019
AB  -  Soil salinity expressed by electrical conductivity is a threat to crop production. The study aims were to establish relationships of electrical conductivity with its relevant soil properties, and analyze variability of soil salinity in the coastal zone of Bangladesh. A total of 150 geo-referenced saline soil samples from three coastal districts (Khulna, Satkhira and Bhola) of Bangladesh were analyzed for electrical conductivity of saturated paste extract (ECe), salt cations and other soil properties related to salinity. Statistical and geostatistical analyses were done as required. Moderate to strong significant regression relationships (R2=0.42 to 0.94) were found between ECe and salt cations (ECe=43.12*Na2-46.36*Na+13.97; ECe=12.26*K-2.5;ECe=1.16*Ca-1.97; ECe=0.32*Mg2-1.60*Mg+3.53) of the soils. On the contrary, weak relationships (R2=0.05 to 0.21) were found between ECe and other soil properties (ECe=4.41*organic carbon-0.56; ECe=-1.71*Txw (soil texture)+3.98;ECe=0.35*cation exchange capacity-1.98; ECe=0.06*specific surface area-0.55). Khulna soils (CV=65.99%) showed lower statistical variations while Satkhira (CV=97%) and Bhola (CV=105%) soils showed higher statistical variations for ECe. In contrast, Khulna, Satkhira and Bhola soils showed strong, moderate and weak spatial dependency for ECe, respectively. Interpolated spatial distribution maps of ECe showed variations in individual districts of study areas. The findings would assist soil scientists or farm managers to understand and/or manage saline soils, specially the soils of coastal zone of Bangladesh. 
ER  -