Responses of Growth, Yield, and Disease Assessment Indices of Tannia [Xanthosoma Sagittifolium (L) Schott] to Plant Spacing and Manure Sources in Umudike

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K. O. ORJI
E. U. Mbah
C. O. Muoneke

Abstract

A field study was conducted for three consecutive years to investigate the effect of plant spacing and manure sources on growth, yield and disease assessment indices of tannia [Xanthosoma sagittifolium (L) schott] at the Forestry Research Institute of Nigeria, Eastern Research Station, Umuahia.  A piece of land measuring 11m x 20 m was cleared and prepared for beds of plot sizes of 4 m x 3 m with a space of 1.0 m and 0.50 m between and within plots, respectively. The experiment was laid out in a 3 x 3 factorial fitted into Randomized Complete Block Design (RCBD) in which Factor A comprised three organic manure sources (control, poultry and goat manures of 5 t ha-1 each while Factor B formed three planting spaces (1.0 m x 0.30 m, 1.0 m x 0.40 m and 1.0 m x 0.50 m) with 33333, 25000 and 20000 ha-1 plant densities, respectively. There was a total of nine treatment combinations with three replicates. Cormels of equal sizes were planted in June in each of the three years. The results showed that there were no significant main and interaction effects of plants spacing and manure sources on leaf area, leaf area index, dry matter production, harvest index and disease incidence of tannia.

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