Agricultural Science

Agricultural Science

ISSN: 2291-4471 (Print)    ISSN: 2291-448X (Online)

Volume 1 (2013), No. 3, Pages 13-23

DOI: 10.12735/as.v1i3p13

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Effects of Manure Management and Nitrogen Levels on Soil Organic Carbon in the Northern Guinea Savanna, Nigeria

Joseph Tanimu1  Sunday Wakili Jula Lyocks2  Clement Alex Onwu1  Pedro Ezomon Imadojemu1 

1Department of Soil Science and Land Resources Management, Federal University Wukari, Taraba State
2Samaru College of Agriculture, Division of Agricultural Colleges, Ahmadu Bello University, Zaria


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A two years study was carried out in two locations at Institute for Agricultural Research and the Samaru College of Agriculture Farms (Lat. 11° 11’’ and Long. 7° 38’’) in the Northern Guinea Savanna zone of Nigeria. The study aimed at investigating the effects of cow dung management practices, time of application when combined with inorganic fertilizer (urea) and their direct and residual effects on organic carbon content of the soil. The treatments consisted of three cow dung management practices, four different storage times after one month ageing and two levels of nitrogen. There was a control treatment where no cow dung or nitrogen fertilizer was applied. The study was a factorial experiment with three factors, laid out in a randomized complete block design replicated three times. The manure amended treatments were generally higher than the control treatments in the two years and at both direct and residual effects. This showed that the addition of cow dung actually increased the organic carbon content of the soil. However, the highest organic carbon value for 2003 and 2004 years of direct effects, at 4 WAP were on treatments pit covered May (54.5 g kg -1 and 49.0 g kg -1 respectively), while the lowest values were observed on the control treatments (30.7 g kg -1 and 24.7 g kg -1 respectively). The management practices and the time (month) of application did not show any significant effect on the content of the soil organic matter of the soil.

Keywords: manure management, Nigeria, nitrogen, northern Guinea Savanna, soil organic carbon, time of application

To Cite this Article: Tanimu, J., Lyocks, S. W. J., Onwu, C. A., & Imadojemu, P. E. (2013). Effects of manure management and nitrogen levels on soil organic carbon in the Northern Guinea Savanna, Nigeria. Agricultural Science, 1(3), 13-23.

Copyright © Joseph Tanimu et al.

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This article is published under license to Science and Education Centre of North America. This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License.

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Effects of Manure Management and Nitrogen Levels on Soil Organic Carbon in the Northern Guinea Savanna, Nigeria