Chlorophyll Content and Growth of Soybean Plants: Possible Interaction of Iron Availability and Day Length.
Data indicate a relationship between the availability of iron and the response of "Hawkeye" soybeans to day length. The more readily available the iron, the less influence an increase in day length on dry weight. When iron was present but not chelated the plants remained green in a 16-hour day but became chlorotic in a 9-hour day.
Benedict
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Swidler
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Simons
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