The effect of vernalization and photoperiod on the length of the growing season of cereals

alopecurus pratensis arrhenatherum elatius avenas avoine barley cebada crecimiento croissance cultivos de invierno cultivos de primavera culture d'hiver culture de printemps dormance dormancy emergence emergencia essai greenhouses growth invernaderos latencia light regimes macollamiento oats orge periodo vegetativo phleum pratense pruebas regimenes de luz secale cereale serre spring crops tallage tillering trials triticale triticum vegetative period vernalisation vernalization winter crops