2003f-793 africa agriculturalinnovations agriculturalpollution agriculture agrobiodiversity alcohol asia aspectosreligiosos aspectossociales biodiversityconservation biogtechnology biomassenergy biotechnology breeding composition congresses control cornasfood cornbread cornindustry cornproducts cornproductsindustry crops cropyields diseasesandpests east economicaspects economicconditions effectofchemicalson effectofwaterpollutionon environmentalaspects ethanolasfuel ethnobotany ethnology farmers farmmechanization farms fertilizers fiction fieldcrops folklore food foodhabits freetrade geneticallymodifiedfoods geneticengineering genetics germplasmresources groundwater growth herbicides history indianmythology indians indiansofmexico indiansofnorthamerica indigenouscrops indiosdeméxico indonesia iowa juvenileliterature landuse maíz maïs medicine mexico mexique missouririvervalley mutationbreeding méxico mœursetcoutumes nahuas northamerican oneidaindians pestcontrol pesticides pests plantdiversity plantdiversityconservation politicalaspects pollution popolucaindians processing productionengineering quantitativegenetics religion religiousaspects religiónymitología research rice riskassessment rural seeds socialaspects socialconditions sociallifeandcustoms soybean soybeans spain sugarcane technologytransfer traditional traditionalmedicine transgenicplants tzotzilindians unitedstates utilization varieties venezuela veracruz-llave(state) wb50dm4c527h2003 wheat winnebagoindians yaquirivervalley yields zeamays zinacantán