Abstract
The effects of CaCO3 and Fe on the dry matter yield and uptake of P, Ca, Mg, Fe and Mn were studied in the green-house on oats (Avena sativa) grown on light-textured soil. Dry matter yield increased by 14, 25, and 30 per cent at 2, 4 and 8 per cent CaCO3 over control in absence of iron. Application of iron upto 20 ppm also increased dry matter yield significantly over control. Both CaCO3 and iron exercised a synergistic effect on dry matter yield. Concentration and uptake of phosphorus decreased significantly with increasing level of CaCO3 and iron application. Application of CaCO3 increased concentration and uptake of calcium significantly. Concentration of calcium decreased at 5 and 20 ppm of iron in absence of added CaCO3 over control but its concentration and uptake increased with increasing amounts of iron in the presence of added CaCO3. Application of CaCO3 and iron decreased concentration and uptake of Mg. Concentration of Fe increased at 20 ppm of applied iron in absence of added CaCO3 over control but decreased in the presence of added CaCO3. Increasing amounts of CaCO3 decreased concentration and uptake of iron drastically in presence and absence of applied iron. Iron and CaCO3 decreased drastically the concentration and uptake of Mn in oats.
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