MODELLING OF WATER POTENTIAL AND WATER UPTAKE RATE OF GREENHOUSE TOMATO PLANTS
The dynamic model presented in this paper uses transpiration rate as input. Compared to the values measured with the pressure chamber the level of the water potential is predicted reasonably well. It is shown that it is not possible to measure the dynamic behaviour of the water potential with the pressure chamber. Therefore a device is needed that measures water potential continuously and non-destructively. None of the available devices is suitable for this purpose.