Abstract
Abstract The effect of two levels of farmyard manure (0 and 20 t/ha), two levels of P (0 and 200 kg/ha) and six levels of Zn (0 to 240 kg/ha) on the iron nutrition of rice (Oryza sativa Cv. Jaya) and wheat (Triticum aestivum Cv. Sonalika) in lateritic, black and alluvial soils was studied in a pot experiment. The farmyard manure addition had no effect on iron content of rice or wheat. Upon phosphorus fertilization, the iron concentration and uptake of rice increased in the lateritic soil, decreased in the black soil and was unchanged in the alluvial soil. The zinc treatments had no effect on the iron content of rice. Added zinc decreased the iron concentration and uptake in wheat grown in the black and alluvial soils.
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