LAND SUITABILITY EVALUATION OF BASALTIC SOILS FOR CASSAVA PRODUCTION IN CROSS RIVER STATE, NIGERIA

  • I.N. Onyekwere National Root Crops Research Institute, Umudike, Abia State, Nigeria
Keywords: Cassava, Evaluation, Production, Soils and Sustainability

Abstract

Pedological study was conducted in soils derived from basalt parent material in Ikom, Cross River State, South-
South Nigeria to assess their suitability for sustainable cassava production. A total of 500ha of land was surveyed
using the rigid grid format and three mapping units were delineated based on similarities and differences
observed in the morphological properties. Profile pits were dug in the identified mapping units. The Pits were
sampled according to genetic horizons and taken to laboratory for analyses. From the analytical results the
characteristics of the soils ranged as follows: soil texture, Sandy clay loam to Clay, pH, 4.3 to 4.4; Organic C, 11.6
to 28.0 g kg-1; total N, 0.8 to 1.7g kg-1; available P, 6.67 to 13. 96 mg kg_1; CEC, 5.91 to 10.59 cmol (+) kg_1 and Base
saturation, 45.91 to 75.11 %. Land Suitability classification was evaluated using the Productivity Index method
which shows that the actual productivity index of the soils ranged from 53.20 to 63.04 %. This is an indication,
that all the mapping units were moderately suitable for production of cassava. For the soils to be highly suitable
(potential suitability) for sustainable cassava production, the fertility status of the soils needs to be improved on.

Published
2020-08-30

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eISSN: 0300-368X