Research Article

Restorative Effects of Amendments on Artificially Degraded Soils in the Southern Guinea Savanna of Nigeria

Adaikwu A.O*, F. K. Salako1, Busari M. A.2, Jamiu Oladipupo Azeez3
1 Department of Soil Science and Land Management, Federal University of Agriculture, PMB 2240 Abeokuta, Ogun State, Nigeria
2 Department of Soil Science and Land Management, Federal University of Agriculture, Abeokuta, Ogun State
3 Department of Soil Science and Land Management,Federal University of Agriculture, Abeokuta
* Corresponding author: adaikwuao@fuam.edu.ng
Published: Apr, 2020
DOI: 10.67042/njss.2020.8lo8t4ud
Pages: 124-132
Views: 510
Downloads: 723

Abstract

An evaluation of the productivity of degraded alfisols at Makurdi and Otobi, Nigeria, using artificial desurfacing techniques (ADT) was carried out in 2012 and 2013 cropping seasons. The study was a split-split plot experiment arranged in a Randomized Complete Block Design with three replications. The soil was desurfaced at 0 – 5, 0 – 10, 0 – 15, 0 – 20 cm and the undesurfaced soil, 0 cm (control) depths. The restorative amendments were 9 t ha-1 of poultry dropping as an organic source of manure, N:P2O5: K2O as an inorganic source of manure and zero application as control. Soybean variety TGX 1448-2E and maize variety, Oba super II were used as test crop. Saturated hydraulic conductivity was significantly (P = 0.05) lower at 20 cm (29.08 cm hr-1), but did not differ significantly at 0 to 10 cm depths. Soil pH of 5.58 was recorded at 0 cm depth and it decreased to 5.05 at 20 cm depth. Also, organic matter content (1.71 – 1.00 g kg-1), total nitrogen (0.12 – 0.08 g kg-1) as well as CEC (7.39 – 6.24 cmol kg-1) recorded a significant decrease with increase in soil depth from 0 to 20 cm depths. Application of poultry manure increased total porosity and saturated hydraulic conductivity as well as organic matter content across desurfaced depths. Soybean number of leaves was significantly (P = 0.05) reduced at 4, 7, and 10 WAP with increased topsoil removal. The highest grain yield of soybean (1474 kg ha-1) was recorded on poultry manure treated plots which were significantly higher (p = 0.05) than other treatments. Application of poultry manure caused 20 % soybean yield reduction at 5 depth and a 56 % reduction at 20 cm depth.

Keywords

Artificial desurfacing Soil amendments Soil productivity

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How to Cite

A.O, A., Salako, F. K., A., B. M., & Azeez, J. O. (2020). Restorative Effects of Amendments on Artificially Degraded Soils in the Southern Guinea Savanna of Nigeria. Nigerian Journal of Soil Science, 30(1), 124-132. https://doi.org/10.67042/njss.2020.8lo8t4ud

A. A.O, F. K. Salako, B. M. A., and J. O. Azeez, "Restorative Effects of Amendments on Artificially Degraded Soils in the Southern Guinea Savanna of Nigeria," Nigerian Journal of Soil Science, vol. 30, no. 1, pp. 124-132, April 2020. doi: 10.67042/njss.2020.8lo8t4ud

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