Abstract

 
 
 A reconnaissance survey conducted at the University of Ilorin Sugar Research Farm (USRF) revealed four dominant soils at Site 1 (USRF1) and one at Site 2 (USRF2). The soils were characterized and classified according to both the Soil Taxonomy (ST) and the World Reference Base for Soil Resources (WRB). Also, the suitability of the soils for sugarcane cultivation was evaluated using the limitation approach. While the USRF1 soils were reddish, the USRF2 soil was greyish due to poor drainage. The USRF1 soils were loamy sand with the AB-horizons of pedons II and III being gravelly. Pedon V had sandy loam surface, sandy clay loam subsurface and clay loam subsoil. The USRF1 soils were moderately acid while the USRF2 soil was slightly acid to slightly alkaline. Exchangeable calcium (Ca2+) content of the USRF2 soil which averaged 4.00 cmolc kg–1 was 2-3 times higher than that of the USRF1 soils. The USRF2 soil also contained higher Mg2+, K+ and Na+, 2-3 folds higher effective cation exchange capacity and > 10 folds higher soil organic carbon (with mean of 11.60 g kg–1) and total nitrogen (mean of 0.94 g kg–1). Under ST, pedons I and IV classified as Typic Haplustepts, II and III as Lithic Haplustepts and V as a Kanhaplic Haplustalf. Under WRB, pedons I and IV classified as Eutric Regosols (arenic), II and III as Endo-pisoplinthic Cambisols (arenic) and V as a Gleyic Lixisol (loamic). Pedon V was highly suitable (85.25%), I and IV moderately suitable (64.53%), II marginally suitable (47.40%) and III unsuitable (35.62%) for sugarcane cultivation.
 
 
Highlights
Agriculture provides food for humans and domesticated animals, raw materials for industries and helps to accelerate economic growth of developing countries (Sajjad et al, 2014)
Soil mapping and land evaluation are very useful for achieving food security and environmental sustainability (Obasi et al, 2016)
According to Stewart (1968) and van Diepen et al (1991), land evaluation is the assessment of suitability of land for potential use in agriculture, forestry, engineering, hydrology, regional planning, and recreation, among others
Summary
Agriculture provides food for humans and domesticated animals, raw materials for industries and helps to accelerate economic growth of developing countries (Sajjad et al, 2014). Soil mapping and land evaluation are very useful for achieving food security and environmental sustainability (Obasi et al, 2016). On the other hand, is the measurement of soil properties by laboratory procedures and other standard methods using soil samples from pedons for the purposes of soil classification (Buol et al, 1997). It provides information on properties of soils that could be used in designing strategies for managing crop production, forests and grasslands (Ogunkunle, 2005). The characteristics of a soil determine its suitability for crop production, and they are an agglomeration of the properties of each horizon in its profile (Olaniyan and Ogunwale, 2006)
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