Indian Institute of Horticultural Research, Hessaraghatta, Bangalore, 560 089
Studies on spatial distribution of root activity in grape vine (Vitis vinifera L.) cv. Anab-e-Shahi using radioactive 32P soil injection technique have shown that during the vegetative phase, as much as 70 per cent of the root activity was located deeper in the soil between 45 and 75 cm depths. There was considerable root activity amounting to 34 per cent even at a depth of 75 cm. Nearly 80 per cent of the root activity was confined to a radial distance of 100 to 120 cm. Results indicate that for grape (V. vinifera L.) cv. Anab-e-Shahi, on a well drained sandy clay loam soil under irrigated conditions, deeper placement of fertilizers between 45 and 75 cm depth, within a radial distance of 100 to 120 cm may result in better utilization.
