The Use of Agar Nutrient Solution to Simulate Lack of Convection in Waterlogged Soils

Abstract

Agar at 0n1 % in nutrient solution (' stagnant solution ') was used to prevent turbulence (convection), thus simulating the slow gas movements which occur in waterlogged soils. Wheat, aged between 6 and 16 d at the start of the treatment, was used to test plant growth and development in this stagnant solution for 8-15 d. K-MES buffer at 5 mol m -$ was used to retain the pH of the rhizosphere in the stagnant solution at pH 6n5.