Influence of the type of mineral soil on the uptake of dieldrin by wheat seedlings

Abstract

The effect of soil type on the uptake of dieldrin by wheat seedlings was studied using seven mineral soils containing 9 to 23 ppm of dieldrin. Although wheat seedlings grown in the sandy soils contained more dieldrin than those grown in the clay soils, there was no close relationship between sand, clay, or organic matter contents of the soils and the dieldrin contents of the plants. However, there was significant correlation between dieldrin uptake by wheat seedlings, the silt content of the soils, and the concentration of dieldrin in the soil water.

Fate of dieldrin in radishes

“…Volatilization of dieldrin from soil over a growing season and absorption through the leaves of com, combined with root absorption, results in residues up to 1.33 ppm (Taylor et al, 1976). The availability of dieldrin for absorption by plants is increased by increasing the water content of the soil (Saha et al, 1971) and decreasing the soil organic content (Saha et al, 1971; Wheeler et al, 1967b;Harris and Sans, 1972;Nash et al, 1970). Wheeler et al (1967b) observed 2-6 times higher levels of dieldrin in forage plants grown in sand than in plants grown in soil.…”