Abstract
In order to estimate evaporation and water uptake by pseudo-roots, pressure heads in the soil column were measured in detail. An undisturbed soil column (20cm in the diameter and 60cm in length) buried with pseudo-roots was used. In the analysis, we divided the column from the top into six layers at intervals of 10cm. The amount of the decrease of volumetric water content in each layer was evaluated by using soil moisture characteristic curve. In consequence, the sum of the decrease of volumetric water content in each layer was in good agreement with the loss in weight of the soil column. Evaporation from the top surface of the column was evaluated as an amount of decrease of volumetric water content in the 1st layer. Water uptake by pseudo-roots was evaluated as a sum of the decrease of volumetric water content from 2nd to 6th layers of the column.
