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Response of Okra (Abelmoschus esculentus) to Lime and Phosphorus Fertilization in an Acid Soil

Author(s): F.I. Oluwatoyinbo | M.O. Akande | J.A. Adediran

Journal: World Journal of Agricultural Sciences
ISSN 1817-3047

Volume: 1;
Issue: 2;
Start page: 178;
Date: 2005;
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Keywords: Lime | okra yield | phosphorus | soil acidity

A pot experiment was conducted to determine the effect of lime (CaCO3) and phosphorus (P) application on the growth and yield of okra (Abelmoschus esculentus) on an acid soil. This was followed by a field trial to validate the findings from the pot study. Three rates of lime equivalent to 0, 500 and 1000 kg CaCO3 ha 1 and five rates of P equivalent to 0, 10, 20, 30 and 40 kg P ha 1 of single super phosphate were applied in combinations as treatments. Pot study results obtained showed that plant growth, dry matter and fruit yields of okra were significantly increased due to application of low rates of lime or P and varying combinations of both, when compared with the control (no fertilizer, no lime). Combination of the lowest rates of lime and P (10 kg P and 500 kg CaCO3 ha 1) was found to be optimum for plant growth. Dry matter yield of plant shoot and root increased with increasing rates of both lime and P applied. However, highest fruit yields were obtained when lime was applied with or without P, while P increased fruit yield to the highest values only in the presence of lime. The results obtained in the field were similar to the trend observed in the pot study. Lime had significantly positive effect on P concentration in plant and actually reduced the amount of fertilizer P required for optimum yield. Therefore, for good performance of okra on acid soils it is beneficial to apply low level of lime along with low rates of P.
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