Dark Brown Forest Soil was collected from Hengren in Liaoning. Aquesous solution of ⁷⁵SeO₂ is mixed with the soil. Se adsorption, distribution and accumulation in wheat v as studied with pot-experiments. Amount of 75Se uptaked by wheat depends on the stages of growth. It is more in seeding stage, lesser during jointing to heading,and has a rapid increase during heading to maturity.Se contents in wheat grain croped on the soil containing 0.131 ppm and 1.631 Ppm of Se are 0.023 ppm and 0.493 ppm, respectively...