000			01351nam a2200205Ia 4500
008			220216s9999 xx 000 0 und d
100			_aSrinivasan K
245		0	_aRoot excavation studies in a mature rubber (Hevea brasiliensis Muell.Arg) plantation
260			_bNatural Rubber Research _c2004
300			_a18-22
520			_aA sixteen year old rubber(Hevea brasiliensis) plantation was subjected to a study on root distribution pattern using the logarithamic spiral trench method. Considerable variation in root intensity was observed for different soil depths and lateral distances sampled. Total root intensity was maximum in the upper-0-10 cm soil layer for all the lateral distances. The soil zone lying within 3 m lateral distance from the base of the tree and at 30 cm soil depth accounted for almost 70 per cent of the total roots for the rubber trees studied. This forms the zone of root activity for most of the field intercrops. However, crops with limited root spread can be intercropped with rubber under quincunx planting. Also, there is a scope for integrating deep-rooted multi-purpose trees with rubber.
650			_aIntercropping
650			_aNatural rubber
650			_aRoot distribution
650			_aRoot excavation
650			_aRoot intensity
700			_aKunhamu T K
700			_aMohankumar B
942			_cJS
999			_c67251 _d67251