||Sensitivity of Agricultural Ecological System Models and Implications for Vulnerability to Toxic Chemicals.
Kickert, R. N. ;
||California Univ., Riverside. Statewide Air Pollution Research Center.;Corvallis Environmental Research Lab., OR.
Farm crops ;
Mathematical models ;
Multivariate analysis ;
Cotton plants ;
Corn plants ;
Tomato plants ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
Published results of sensitivity experiments on agricultural models by international authors are analyzed with a simple univariate sensitivity index. Values for system parameter and response-effects at ratios greater than 2.0 or 3.0 are presented for different crop plants, ecosystem components and processes. Responses are ranked according to their level of sensitivity to direct and indirect changes that conceivably could be imposed by manufactured chemicals. Of several hundred agricultural modeling publications, only 8.5% was found to contain results from sensitivity analysis experiments performed by their original authors. The low proportion means that environmental interactions and biological species other than those for which such results are published might be of equal or greater sensitivity and importance if comprehensive sensitivity analyses were available across all crops and ecological processes. (Copyright (c) 1984 SETAC.)