At emergence of the first true leaves, iron becomes an immobile nutrient and the plant must rely on soil availability to supply iron needs.
(iron; becomes; an immobile nutrient; L:At emergence of the first true leaves) (the plant; must rely; on soil availability; to supply iron needs) Context(the plant must rely,List([77, 96))):(the plant; must rely on soil availability to supply; iron needs)
the plant must rely,List([77, 96))
iron the plant the plant
becomes must rely must rely on soil availability to supply
an immobile nutrient L:At emergence of the first true leaves
on soil availability to supply iron needs
iron needs