A pot experiment was conducted with groundnut crop in two red soils collected from Tindivanam and Pollachi. They were treated with Calcium at 0.75 and 150 kg ca/ha in two forms namely calcium sulphate and carbonate along with two levels of each of phosphorus, potassium and magnesium and constant dosages of nitrogen and boron. The two soils were analysed for various physical and chemical characteristics. After the harvest of the crop, groundnut shoot, root, kernel and shell were analysed for calcium. Calcium uptake by groundnut shoot, root and kernel was significantly high in calcium treatment compared to control. Calcium sulphate application caused greater uptake of calcium than calcium carbonate. Potassium showed inhibiting effect on calcium absorption by shoot,
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