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Effects of Acidification, Iron Oxide Addition, and Other Soil Treatments on Sorghum Chlorosis and Iron Absorption
Author(s) -
Olson R. V.
Publication year - 1951
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1951.036159950015000c0020x
Subject(s) - chlorosis , sorghum , soil water , absorption (acoustics) , iron oxide , citation , chemistry , horticulture , agronomy , environmental science , library science , soil science , computer science , physics , biology , organic chemistry , acoustics
IRON chlorosis of plants appears to be related to many soil factors. Olson and Carlson (10) have shown that low extractable iron contents, high manganese-iron ratios, high pH values, and the presence of free lime enhance the development of chlorosis in sorghums and trees. None of the above factors was found to be critical, however, and an unknown factor has been indicated. Earlier work, by the author (9) showed that the soluble iron in a soil is determined to some extent by the amount of free iron oxides present. It showed also some indication that the form of iron in the normally acid soils of eastern Kansas may be considerably different from that in the normally neutral or alkaline soils of central and western Kansas where chlorosis is more prevalent. Iljin (5, 6) has studied the biochemical changes accompanying chlorosis. He found a greater amount of citric acid and bases, usually calcium, and a lesser content of malic acid in chlorotic leaves than in green leaves. McGeorge (7) concluded that excessive calcium in chlorotic barley seedlings contributed to chlorosis by inactivating the iron in the plant.