It is observed that deficiency of a particular element showed its symptoms
initially in older leaves and then in younger leaves.
a. Does it indicate that the element is actively mobilized or relatively
immobile?
b. Name two highly mobile elements and two which are
relatively immobile.
c. How is the aspect of the mobility of elements important to horticulture
and agriculture?
(a) If it is observed that deficiency of a particular element showed its symptoms initially in older leaves and then in younger leaves than this indicates that the element is actively mobilized.
(b) Highly Mobile elements: Nitrogen and Magnesium.
Relatively Immobile elements: Calcium and Boron
(c) agriculturist and horticulturist to understand the deficiency of a particular element, they observed that the deficiency of a particular element is first in older leaves then comes to younger leaves which shows the elements is actively mobilized. Sulphur is an immobile element so it’s deficiency is seen in younger leaves first.
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