Question : 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 elements which are highly mobile and two which are relatively immobile. ( c) How is the aspect of mobility of elements important to horticulture and agriculture.

Question : It is observed that deficiency of a particular element show

1.	Question : 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 elements which are highly mobile and two which are relatively immobile. ( c) How is the aspect of mobility of elements important to horticulture and agriculture.
Answer» Solution :(a) Plant TRIES to send mineral elements into mature leaves. In comparison to older leaves when element mobilizes the the effect of its deficiency is first SEEN on older leaves. Because particular mineral element first reaches to the top of the tree. So lower leaves can not obtain it. (b) P, K and Mn are more MOBILIZED elements while `Ca^(+++) and K^+` are less mobilized elements. ( c) Important of mobilized mineral element in agriculture and Horticulture. (i) The crop. in which productivity is obtained from older leaves, its economic VALUE is decreases (ii) The crop is which flowers fruits and FLORESCENCE are not produced there immobilized elements don.t reach till top. So they decrease yield.