The causes of iron chlorosis of Mandarin Region of Aegean Region
1978
Kovanci, I. | Hakerlerler, H. (Ege Univ., Faculty of Agriculture, Izmir (Turkey). Div. of Soil Science) | Hoffner, W. (Justis Liebig Univ., Giessen (Germany). Inst. fuer Pflanzenernaehrung)
To ascertain reasons for chlorosis in madarin orchards, microelement content in leaf and soil samples from 20 representative mandarin plantages in Izmir-region (Turkey) have been determined. In soil samples also, texture pH and content of P, CaCO3, HCO3 and salt were analyzed. Fe-, Zn- and Mn- contents of leaves did not help to clarify the reason for chlorosis. There was also no significant correlation between the amount of ammonium-acetate soluble microelements in the soil and the appearence of chlorosis. HCO3- seems to be the main reason of chlorosis, because its content in most of the chlorotic plantages was raised. According to these results, improvement of the drainage systems as the most important step in curing chlorosis is concluded. Spraying with Fe- and Zn- chelats are considered only as preliminary steps
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