This is an implementation of the classic Claassen-Barber model of mineral nutrient uptake from soil by a growing root system. It is a direct but more accessible and sophisticated implementation of the model described in the 1984 book by Barber and of the computer program described by Oates and Barber in 1987. The loss of carbon from roots via soluble exudation involves both a passive efflux of C compounds and an active influx of specific C compounds. This model simulates these processes in sterile and non-sterile soil conditions allowing theeffect of changing physical and biological conditions on net C flow into soil to be explored. 1997 Rhizodeposition under ambient and elevated CO2 levels.
Exudation varies along the root and so efflux varies with time.
The model simulates the accumulation of organic acids in the rhizosphere over a 24h period in sterile soil. Critical evaluation of organic acid mediated iron dissolution in the rhizosphere and its potential role in root iron uptake. Plant and Soil 180, p57-66. Collaborative Cornell Oxford Local interest only Department Coments and Feedback should be sent to Peter.