CLEMENTS 



PLATE I 



A. Rodent exclosuro sliowiriK combined effect of cattle and ro<ients on the crop of winter 



annuals, cliiefly poppy {EschxchoUzta mexicana), Santa Rita Resor%e. 



B. DifTerence in yield of poppies in rotient exclosure, cattle exclosure and pasture, Santa 



Rita Reserve. 



