Effect of Application of Iron, Farmyard Manure and Sulphur on the Availability of Iron in Medium Black Calcareous Soil at Different Moisture Regimes

Incubation study of medium black clayey calcareous soil with the application of iron (FeSO₄-7H₂O), FYM and elemental sulphur at various soil moisture regimes showed that FYM å 10 t/ha, S å 80 ppm and Fe å 10 ppm significantly increased the availability of iron. The effect of these treatments was more pronounced as incubation period increased up to 42 days. There was three-fold increase in available iron when the moisture status of soil was raised from 5O per cent of field capacity to saturation.