University of California Publications in Geography, Volumes 17-19

activities agricultural alien Alturas Anguilla animals annual Antigua appears areas Barbuda become California carried cattle century clearing common complex concept considerable continued cover crop culture culture groups developed distribution domestic early eastern economic effect established farm field forest Garden grass ground groups growing growth Guinea important included increased Indian introduced islands Lake land Leewards less mills Modoc County Mountains native nature occupied occur operation origin particular pasture patterns period permanent plain plants political population practice present probably production range reached regions relatively remained reported residence result rice River roads season settlement shifting cultivation soil southern species spread suggests surface territorial tion town trees tropical Tule Lake types Valley variety vegetation village volcanic West whole wild woodland