<abstract xmlns="http://www.w3.org/1999/xhtml">Field experiments were carried out at the Teaching and Research Farm, Landmark University, Omu-Aran, Kwara State, Nigeria, in the cropping seasons of 2015 and 2016. The soil at the site of the experiment is an Alfisol classified as an Oxichaplustalf or a Luvisol. The trial consisted of sole and combined applications of urea fertilizer (U) applied at 0, 60, and 120 kg·ha−1 and maize cob ash (M) applied at 0, 3, and 6 t·ha−1. The results showed that U and M alone or in combinations increased the soil chemical properties, growth, yield, and mineral composition of okra compared with the control. M alone at 3 t·ha−1 produced optimum soil chemical properties, yield, and mineral composition of okra fruit. U alone at 60 kg·ha−1 produced optimum yield of okra, while growth and mineral composition were increased when urea fertilizer was applied at 120 kg·ha−1. The treatment with U applied at 60 kg·ha−1 in combination with M applied at 3 t·ha−1 (U60M3) produced the highest values of okra yield, while U applied at 120 kg·ha−1 in combination with M applied at 3 t·ha−1 (U120M3) has the highest growth and highest N, K, Ca, Cu, and Fe contents of okra fruit. Compared with the control and using the mean of the two years, U60M3 increased okra fruit yield by 93.3%. Therefore, for viable production of okra in low nutrient soil of the Nigeria derived savanna or similar soils elsewhere, 60 kg·ha−1 U + 3 t·ha−1 M (U60M3) is recommended. However, for improved mineral quality of okra, 120 kg·ha−1 U + 3 t·ha−1 M (U120M3) is recommended.</abstract>

Field experiments were carried out at the Teaching and Research Farm, Landmark University, Omu-Aran, Kwara State, Nigeria, in the cropping seasons of 2015 and 2016. The soil at the site of the experiment is an Alfisol classified as an Oxichaplustalf or a Luvisol. The trial consisted of sole and combined applications of urea fertilizer (U) applied at 0, 60, and 120 kg·ha−1 and maize cob ash (M) applied at 0, 3, and 6 t·ha−1. The results showed that U and M alone or in combinations increased the soil chemical properties, growth, yield, and mineral composition of okra compared with the control. M alone at 3 t·ha−1 produced optimum soil chemical properties, yield, and mineral composition of okra fruit. U alone at 60 kg·ha−1 produced optimum yield of okra, while growth and mineral composition were increased when urea fertilizer was applied at 120 kg·ha−1. The treatment with U applied at 60 kg·ha−1 in combination with M applied at 3 t·ha−1 (U60M3) produced the highest values of okra yield, while U applied at 120 kg·ha−1 in combination with M applied at 3 t·ha−1 (U120M3) has the highest growth and highest N, K, Ca, Cu, and Fe contents of okra fruit. Compared with the control and using the mean of the two years, U60M3 increased okra fruit yield by 93.3%. Therefore, for viable production of okra in low nutrient soil of the Nigeria derived savanna or similar soils elsewhere, 60 kg·ha−1 U + 3 t·ha−1 M (U60M3) is recommended. However, for improved mineral quality of okra, 120 kg·ha−1 U + 3 t·ha−1 M (U120M3) is recommended.

Effect of Urea Fertilizer and Maize Cob Ash on Soil Chemical Properties, Growth, Yield, and Mineral Composition of Okra, <italic>A<sc>belmoschus esculentus</sc></italic> (L.) MOENCH

Journal of Horticultural Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Effect of Urea Fertilizer and Maize Cob Ash on Soil Chemical Properties, Growth, Yield, and Mineral Composition of Okra,  (L.) MOENCH

Field experiments were carried out at the Teaching and Research Farm, Landmark University, Omu-Aran, Kwara State, Nigeria, in the cropping seasons of 2015 and...

Effect of Urea Fertilizer and Maize Cob Ash on Soil Chemical Properties, Growth, Yield, and Mineral Composition of Okra, Abelmoschus esculentus (L.) MOENCH

Published Online: Jun 29, 2018

Page range: 67 - 76

Received: Dec 01, 2017

Accepted: May 01, 2018

DOI: https://doi.org/10.2478/johr-2018-0008

Keywords
urea fertilizer, maize cob ash, okra yield, okra growth, soil chemical properties, okra mineral composition

© 2018 Aruna Olasekan Adekiya et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Effect of Urea Fertilizer and Maize Cob Ash on Soil Chemical Properties, Growth, Yield, and Mineral Composition of Okra, Abelmoschus esculentus (L.) MOENCH

Published Online: Jun 29, 2018

Page range: 67 - 76

Received: Dec 01, 2017

Accepted: May 01, 2018

DOI: https://doi.org/10.2478/johr-2018-0008

Keywordsurea fertilizer, maize cob ash, okra yield, okra growth, soil chemical properties, okra mineral composition

© 2018 Aruna Olasekan Adekiya et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
urea fertilizer, maize cob ash, okra yield, okra growth, soil chemical properties, okra mineral composition