Application of system cluster analysis in classification of farmer household ecosystems

Fifty farmer household ecosystems of Liujialing Village,Jingshan County,Hubei province are numericallg classi-fied by principal composition analyses and system cluster analyses.The results indicate that the farmer hnusehold ecosystems could be classified into three groups:agticulture-animal husbandary.fruit-agriculture-animal husbandary and fishery-agriculture-animal husbandary.The results are quite reflecting the practical situation of the 338 farmer households in the village.