Mechanisms regulating seed germination and emergence of some summer annual weeds in Hokkaido [Japan]

agentes nocivos anatomia anatomie anatomy animal developmental stages annual weeds asia asie biogeografia biogeographie biogeography centrospermae chenopodiaceae chenopodium condiciones ambientales condition de milieu developmental stages dicotiledoneas dicotyledons distribution naturelle dormance dormancy echinochloa emergence emergencia environment environmental conditions environnement etapas de desarrollo etapas de desarrollo de la planta etapas del desarrollo animal facteur nuisible geografia geographie geography glumiflorae graine gramineae injurious factors japan japon latencia malezas malezas anuales mauvaise herbe mauvaise herbe annuelle medio ambiente monocotyledons natural distribution plant anatomy plant developmental stages plantas plante plants polygonaceae polygonales seeds semilla storage organs weeds