Effect of K and bentonite additions on Cs-transfer to ryegrass

Greenhouse testing proved that the RIP effects observed in greenhouse could be predicted by making use of the sorption data from the laboratory tests. Optimum soil-amendment would be obtained with bentonites with high initial sorption RIP and a high sorption RIP increase when subjected to WD in the presence of potassium. Hypothised Transfer Factor (TF)-reductions of at least 10-fold could result when mixing ∼1% bentonite, like Otay bentonite (RIP yield 99 000 meq kg−1 after WD in presence of K if only fine particle size of <1 mm considered) with the contaminated ploughing layer.