Section 15
Chapter 14,123

Nutrition of rice with reference to the occurrence of akagare disease. VI. Changes in growth, nutrient absorption and metabolism as affected by excessive supply of ferrous iron.

Baba, I.; Tajima, K.

Proc. Crop Sci. Soc. Japan 29: 47-50


Accession: 014122254

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With excessive Fe++ supply, tiny blackish-brown spots appeared on the lower leaves which then turned brown or reddish-brown and died. Heavy N fertilizing, deficiency of P and K and low solution pH intensified this effect. Leaf discoloration due to excessive Fe++ was severe at the vigorous-tillering and booting stages. Severe brown discoloration of the grain occurred at heading and flowering.