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Abstract
Four soil profiles were dug at the study location which was characterized by a surfacial loesslal deposit overlying Precambian Basement Complex rocks. The soils were studied for their content and pedogenlc distribution of total, hot water soluble and NaOAc extractable Boron, B. The relationship between the B contents of the various forms and selected soil properties were examined by use of correlation and regression analysis. A detailed profile examination of B distribution with depth revealed that the total B tends to increase with depth and accumulate in the upper Bt horizons.
The total B values correlated with clay and silt. The hot water soluble B vas concentrated is the soil surface and appeared to be related to the organic latter content of the soils. The NaOAc extractable B generally recorded lower surface values of B than the underlying Ap2 or AB horizons. The NaOAc method consistently extracted higher amounts of B than the hot water extract. The NaOAc extractable B values did not correlate significantly with any of the selected soil properties whilst significant correlations were observed between hot water extractable B and clay, organic latter amongst other soil properties. The soils were found to contain fairly high amounts of total B, but hovever indicated probable deficiencies of available B. The study suggests, management practices with specific reference to B fertilization.
Notes
Present Address: lational Fertilizer Centre, Moor Plantation, Ibadan