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The study assessed suitability of land for lowland rice production in Benue State using Geographic Information Systems (GIS). Soil map with 12 mapping categories evaluated using FAO, 1979 framework. The soils were reclassified using critical limiting factors based on nutrient, rainfall, temperature and other soil parameters. The soil mapping categories are 2a upon Recent Alluvium, 15a (Aeolian sands) 15d, 17, 18a, 18d, 19a, 19c, 20b 21b, 22b and 24a.The assigned soils had final rating of from 0.0 permanently unsuitable (0.2) as unsuitable (0.5) marginally suitable (0.8) as moderately suitable and (1.0) as highly suitable. The raw samples taken and those established from soil survey reports were coverted to grid. An analysis in Arcview called overlay was done and further the results was reclassed resulting to a suitability map. while distance analysis / buffering for determination of further suitability was carried out along the drainages. It was discovered that each soil mapping unit had different nutritional status, with variance in certain degrees or deficient in other important nutrients. Results show suitable lands are deficient in most soil nutrients and did not meet some important limitations. A land area of about 14234.0612644km2 (44.5%) is highly suitable, 9151.0312098 km2 (28.6%) moderately suitable, 1372.4023436 km2 (4.2%) as marginally suitable and 6201.2020400km2 (19.4%) as unsuitable while drainage and built up area have an area of 900.530116km2 (2.8%) and 138.00km2(0.5%) respectively.

Application of Geographic Information Systems in Land Suitability Rating for Lowland Rice Production in Benue State