caa a22 4500 477111017 CHVBK 20180405111609.0 cr unu---uuuuu 170330e19961001xx s 000 0 eng 10.1007/BF02415519 doi (NATIONALLICENCE)springer-10.1007/BF02415519 Aura Erkki Agricultural Research Centre, 31600, Jokioinen, Finland aut Modelling non-uniform soil water uptake by a single plant root [Elektronische Daten] [Erkki Aura] The assumption of uniform water flow to the root or uniform water potential at the root surface was shown by Hainsworth and Aylmore (1986, 1989) to be erroneous. The present paper demonstrates how the non-uniform uptake of water by a single root can be modeled. Differential equations are numerically solved to describe simultaneous water movement in the plant and in the soil. In the plant, boundary conditions are the water potentials at the root surface (Ψs) and in the xylem at the root base (Ψb). A set of difference equations describe the flow of water radially through the cortex to the xylem and in the xylem axially upwards to the base. For calculating the water flow in the soil and the values of Ψs, i.e. the boundary conditions for flow in the root, the finite element method (FEM) is used, the boundary conditions being the flux of water into the plant root and the zero flow across the wall, bottom and surface of a hypothetical soil cylinder surrounding the root. ei]Section editor: B E Clothier Kluwer Academic Publishers, 1996 modeling nationallicence non-uniform nationallicence root resistance nationallicence soil resistance nationallicence water uptake nationallicence Plant and Soil Kluwer Academic Publishers 186/2(1996-10-01), 237-243 0032-079X 186:2<237 1996 186 11104 https://doi.org/10.1007/BF02415519 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02415519 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Aura Erkki Agricultural Research Centre, 31600, Jokioinen, Finland aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers 186/2(1996-10-01), 237-243 0032-079X 186:2<237 1996 186 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer