Variations in the number of beans per pod in Theobroma cacao L. in the Ivory Coast. III. Nutritional factors, cropping effects and the role of boron

abonos bore boro boron cocoa beans cote d'ivoire cultivars cultural methods engrais espacement espaciamiento etapas de desarrollo de la planta fertilizers fruits frutas genotipos genotypes hybride hybrids mode de culture ombrage ombre plant developmental stages plantas de sombra plantation plante d'ombrage planting pods semilla de cacao shade shade plants shading sombra spacing theobroma cacao umbria variedades varieties