How to determine nutrient balances? A.Replicated measurement of stock>Calculation of stock changes B.Replacement of time with space ,false time series'(chronosequences) C.Direct measurements of inputs and outputs to and from the system D.Models:require knowledge of processes and thorough testing(against A,B or C) How to determine nutrient balances? A. Replicated measurement of stock à Calcula.on of stock changes B. Replacement of .me with space à ‚false .me series‘ (chronosequences) C. Direct measurements of inputs and outputs to and from the system D. Models: require knowledge of processes and thorough tes.ng (against A, B or C)