Fertilization in Eucalyptus grand1s on Severely Truncated Soil. I: Growth Studies

A factorial experiment with four levels (0.25, 50 and 75 g/plant) eacb of Urea and Superphosphate was carried out witb E. grandis grown on a severely truncated (Lithic Dystropept) soils at Minmutti, Idukki District, Kerala. Height, collar circumference, crown diameter and volume of E. grandis plants Increased with the application of N ferlilizer alone or in combination with P. However, P application alone was inferior to control treatment. Considering tbe growth parameters, relative treatment elfecllveness (RTE) and relative economic effecliveness (REE), treatment N₇₅ P₇₅ was the best followed by N₇₅ P₅₀ and N₅₀ P₇₅ treatments.