Author Description

The problems md pos~ibilities of constructing growth models are discus~ed using five published growth model^ as a starting point. The models are compared with respect to their structure and form~dation of proce;\se;\. It is only occasionally that the five models agree in their formulations. These different opinions are evaluated against experimental studies and it ic. found that generally the experimental studie~ do not permit a definite decision as to MJ~Zo~fC th~e differentformulutions that is to be preferred. It is concluded that the time i~ not yet ripe for the use of larger sirnulation models to handle growth problems. The present research should instead be directed towards analysing Inore specific plzenornenu