Studies On Soil Conditions In Relation To The Root And Leaf Diseases Of The Coconut Palm In Travancore-Cochin : Part II. Total Phosphoric Acid, Available Phosphoric Acid And Iron Content Of Coconut Soils
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1955
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Abstract
Soils from diseased and healthy areas have been examined for both total and available phosphorus and total iron. The conclusions arrived at are:— (1) There is no significant difference between healthy and diseased areas, in the phosphoric acid status of the soil (total and available). (2) Although soils from healthy areas have a higher content of total iron, as compared to soils of diseased areas, it cannot be concluded that there is an iron deficiency condition in diseased areas, since the quantity of available iron could not be determined. Whether such a deficiency actually exists, has to be found out by other means. (3) Fixation of phosphorus by iron, and consequent non-availability of phosphorus, does not appear to be a factor correlated with disease incidence, since it is obvious that a greater quantity of phosphorus would be rendered unavailable in healthy soils, due to their higher content of iron.
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Indian Coconut Journal Oct-Dec 1955 v.9(1) p-20-29