Field experiments one oach in black loam and red loamy soils were conducted with Co-1 soybean as test crop to study the effect of Mn, Zn and Fe applications. Folar sprays with 1 per cent MnS04 or 0.5% ZnSO4 significantly increased the grain yield and uptake of Mn in black soil, while in red soil application of 25 kg/ha of MnS04/ or ZnS04 resulted in marked increase in grain yield. The influence of FeS04 fertilisation was not marked in both the soils.
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