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Abstract
A field experiment was conducted on a calcareous vertisol to study the effect of soil water treatments (control, field capacity and saturation) for 15 days prior to sowing on yield and iron nutrition of two rice cultivars viz., Karjat 184 (dwarf, lowland) and Tuljapur 1 (tall, upland) grown under upland conditions. Soil saturation (daily two irrigations) for 15 days prior to sowing of rice increased the availability of Fe in soil at sowing as a result of reduction in pH and Eh. The rate of dry matter accumulation in both the rice cultivars was slow until tillering, rapidly increased up to flowering and decreased thereafter. The highest growth rate of 74.4 and 160.9 kg/ha/day in Karjat 184 and Tuljapur 1 respectively was observed between panicle initiation and flowering stages due to presowing soil saturation treatment. Tuljapur 1 recorded higher grain yield than Karjat 184 under upland conditions. Presowing soil saturation increased the rate of Fe uptake in rice up to panicle initiation stage.