Potassium Flashcards
1
Q
Potassium
Mobility
A
Molbile
Older leaves affected first.
2
Q
Potassium
Signs of deficiency
A
Marginal leaf scorch Reduction in yield and growth Mottled chlorosis Small, bronzed leaves Inward curling leaves.
3
Q
Treating deficiency
A
Sulphate of potash
4
Q
Excessive potassium
A
Causes ionic antagonism with magnesium.
Reduces magnesium uptake.
Causes magnesium deficiency.
5
Q
Causes of potassium deficiency
A
Soils that are continuously cropped and not adequately fertilised often show sign of deficiency.
Sodium and calcium in plant tissue often obscure potassium deficiency.
6
Q
Potassium
Rôle
A
Involved in enzyme activation within plant - affects protein, starch and ATP production.
