ABSTRACT

Boron an essential plant nutrient element is one of the few with limited research work and yet is a significant prerequisite for plant growth and development. The study of this research was carried out to determine the distribution of boron in soils of selected profiles along a toposequence in the Landmark University Farm, Eleyin in Isin Local Government Area of Kwara

State which is a Derived savanna agro-ecological zone. For this to be done, a reconnaissance study was conducted in which a toposequence was identified. Three profile pits were dug along the toposequence and sited at the upper (EP1), lower (EP2) and bottom (EP3) positions. Soil samples were collected from identifiable genetic horizons down the profiles and were prepared and subjected to laboratory analysis for their physico - chemical properties and boron distribution. Results show that the soils of the area are slightly acidic to moderately acidic (pH in water 4.98-6.66), while soil texture is generally light-textured to medium-textured with texture ranging from sand to loamy sand at the surface and sandy loam, sand, loamy sand to sandy clay loam at sub-surface levels. Total Nitrogen is rated very low to medium (0.02%-1.11%). Available P and Organic matter of the soils are not generally adequate with a range of “very low” to “low” i.e. 4.93-97.23 ppm and 0.40% to 0.44% respectively.

Generally, Boron is found to be inadequate in the soils with a range of 4.00-7.03 mg/kg of soil which is rated low to medium and thus it is recommended that intergrated soil fertility management processes which would as well involve use of boron micronutrient fertilizers should be incorporated into soils of area.

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