Division of Horticulture and Fruit Technology, I. A. R. I., New Delhi-110012
*Present address: Deputy Director of Horticulture, Lalbagh, Bangalore-4.
Feeder root concentration both in young and old mango trees was much higher at the zone close to the tree (60 cm) at the top 0–15 cm layer of soil. The concentration decreased with increasing distances from the tree and depths in soil. Feeder roots within the periphery (180 cm) and outside were 89.7 per cent and 10.3 per cent respectively in the young trees, while it was 90.5 per cent within the periphery (360 cm) and 9.5 per cent outside, in the case of old trees. A major portion of the feeder roots thus lie within the periphery in case of both young and old mango trees. Greater intensity of feeder roots was observed close to the trunk in the top 0–15 cm layer in the older trees in comparison with the younger ones.
