[Agro-chemical behaviour of boron on sunflower (Helianthus annuus L.) in the soils of the Meknes area (Morocco)] | Comportement agro-chimique du bore sur tournesol (Helianthus annuus L.) dans les sols de la region de Meknes (Maroc)

abonos application methods application rates bore boro boron classification des sols cycling dose d'application engrais environmental factors facteur du milieu factores ambientales fertilizers field experimentation fisiologia vegetal greenhouses helianthus annuus invernaderos maroc marruecos morocco nutrition des plantes plant nutrition plant physiology serre soil classification soil types soil water regimes tipos de suelos type de sol