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International Journal of Sustainable Agricultural Research

June 2020, Volume 7, 2, pp 73-83

Characterization and Classification of Cropland-Soils Affected by Erosion in Igbudu Ikwo, Southeastern Nigeria

Obasi S. N.

Obasi C. C.

Nweke V.

Okolie H.

Obasi S. N.¹

Obasi C. C.² Nweke V.³
Okolie H.²

Department of Crop and Soil Science, National Open University of Nigeria, Faculty of Agriculture, Kaduna Campus, Nigeria. ¹

Department of Crop Science and Horticulture, Nnamdi Azikiwe University, Awka, Nigeria. ²

Department of Agricultural Technology, Imo State Polytechnic Umuagwo, Nigeria. ³

on Google Scholar

on PubMed

Pages: 73-83

DOI: 10.18488/journal.70.2020.72.73.83

Article History:

Received: 04 December, 2019
Revised: 07 January, 2020
Accepted: 10 February, 2020
Published: 02 March, 2020

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Abstract:

This research was carried out in Igbudu Ikwo, Ebonyi State in Southeastern Nigeria to investigate and classify some cropland-soils affected by erosion. Three profile pits were dug and samples were collected in their horizons. The soils physico-chemical properties analyzed indicated that all investigated soils were sandy loam (SL), bulk density was high ranging from 1.51, 1.59 and 1.42 gcm-3in pedons 1, 2 and 3 due to the preponderance of high sandiness, although within the acceptable levels (<1.85). Available P was medium (5 – 15 mgkg-1) in pedon 2 and high (>15 mgkg-1) in pedons 1 and 3. Organic matter was medium (2.0 - 4.2%) at pedons 1 and 3 and low < 2% in pedon 2 when critical limits was considered. This low organic matter content is a challenge as the soils of Igbudu Ikwo is already prone to erosion and would need high organic matter content to bind the soils particles together against disintegration by erosion processes. Sodium was very low (< 0.1 gkg-1) while K was low (<0.1 – 0.3 gkg-1 Therefore, the inputs of K fertilizer would be necessary to enhance the productivity of the soils. Calcium and Mg were very low when critical limits were considered (<2 gkg-1) and (<0.5 gkg-1) for Ca and Mg respectively. Adequate soil conservation practices and improvement of soil nutrients should be adopted for the optimum productivity of the soils of Igbudu Ikwo, Ebonyi State. The pedons were classified as Arenic Kandiudults in USDA soil taxonomy and Arenic Lixisols when correlated with WRB for soil resources.

Contribution/ Originality
This work is the first attempt to characterize and classify soils of Igbudu Ikwo in Southeastern Nigeria even though the area is of huge agricultural significance and under erosion threat. This study provided information on soil physic-chemical properties as well as the current nutrient/fertility situation of the soil.

Keywords:

Soil classification, Soil properties, Soil erodibility, Nutrient critical limits, Igbudu Ikwo, Southeastern Nigeria.

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