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Since nitrogen is an essential part of the chlorophyll molecule, any appreciable lack of it in the mineral nutrient supply of the plant should result in a suppression of chlorophyll formation. The extent of this suppression would, of course, be modified if there were a deficiency in other growth factors such as light, iron, magnesium, carbon dioxide, and water. It is the purpose of this paper to show the relationship existing in leaves of pineapple plants between the total chlorophyll (a + 3) concentration and various amounts of nitrogen applied as fertilizer in a series of field experiments.

RELATIONSHIP BETWEEN NITROGEN FERTILIZATION AND CHLOROPHYLL CONTENT IN PINEAPPLE PLANTS