SOIL NUTRIENT STATUS OF BRICK AND AGRICULTURAL FIELDS
Soil samples were collected from 10 selected brick fields and their respective agricultural fields, at Savar, Dhaka to study their nutrient status. The soils were silty Loam, Loam and silty clay loam in texture. pH values of the brick and agricultural field soils were ranged from 6.20 to 6.80. The EC values of soil ranging from 112 to 136 µS/cm in brick field soils, 112 to 156 µS/cm in agricultural field soils. The organic matter content ranged from 1.03 to 1.32% in brick fields 124 to 1.46% in agricultural field soils. The % total N contents of soils ranging from 0.03 4 to 0.089 in brick field and 0.067 to 0.095% in agricultural field soils. The exchangeable K status ranged from 0.082 to 0.115 meq 100g soil in brick field and 0.098 to 0.127 meq 100g-1 soil in agricultural field soils. The exchangeable Na status varied from 0.258 to 0.581 meq100 g-1 soil in brick field and 0.387 to 0.709 meq l00g soil in agricultural field soils. The exchangeable Ca status ranged from 0.98 to 1.225 meq100 g-1 soil in brick field and 1.225 to 2.206 meq 100 g-1 soil in agricultural field soils. The available S content in brick field soils varied from 11.2 to 16.6 µg g-1soil and agricultural field soils from 10.92 to 15.4 µg -1 soil. The available P status ranging from 11.22 to 17.14 µg soil in brick field soils and 13.03 to 17.74 µg g-1 soil in agricultural field soils. The available Cu and Zn status ranged from 8.3 to 16.2 µg g-1 soil and 7.4 to 14.1 µg -1 soil in brick field soils. In case of agricultural field the available Cu and Zn status ranged from 4.9 to 7.2 and 1.8 to 3.7 µg g-1soil. Most of the nutrients were comparatively higher in agricultural field than those of brick field soils (except Cu & Zn). The overall results indicate that the brick field was responsible for decreasing soil nutrients.