La lucha contra las malas hierbas

aquatic weeds bombas burning chemical control ciclo vital control cultural crops cultivos cultural control cultural methods dust economic distribution escarda farm equipment flooding graine grasslands grazing herbage herbicidas herbicide herbicides horticultura horticulture inondation life cycle lutte chimique lutte culturale mauvaise herbe aquatique methode methods mode de culture pastoreo plante de culture plante ligneuse polvo (contaminantes) pompe praderas pulverizadores pumps quema seeds semilla sprayers weed control weeds woody plants