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Advances in Agriculture
Volume 2015, Article ID 752936, 8 pages
http://dx.doi.org/10.1155/2015/752936
Research Article

Soil Fertility in relation to Landscape Position and Land Use/Cover Types: A Case Study of the Lake Kivu Pilot Learning Site

1College of Agricultural and Environmental Sciences, Makerere University, P.O. Box 7062, Kampala, Uganda
2ICRISAT, P.O. Box 5689, Addis Ababa, Ethiopia
3Rwanda Agricultural Board (RAB), P.O. Box 5016, Kigali, Rwanda
4National Agricultural Research Organization (NARO), Mukono, Uganda
5DIOBASS, Goma, Congo
6NARO, Kabale Zonal Agricultural Research and Development Institute (KAZARDI), Kabale, Uganda
7ICRAF, P.O. Box 26416, Kampala, Uganda
8Universite Evangelique en Afrique, Congo
9CIAT Uganda, P.O. Box 6247, Kampala, Uganda
10CIAT Kenya, P.O. Box 823-00621, Nairobi, Kenya
11FARA, 12 Anmeda Street, Roman Ridge, Accra, Ghana

Received 29 December 2014; Revised 27 March 2015; Accepted 30 March 2015

Academic Editor: Gábor Kocsy

Copyright © 2015 Majaliwa Mwanjalolo Jackson-Gilbert et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study determined the change and distribution of land-uses/covers along the landscape, and evaluated the nutrient status of the top soil layer in the Lake Kivu Pilot Learning Site (LKPLS) benchmarked micro-catchments. Soil physical and chemical properties were quantified using triplicate soil samples collected from each land-use/cover at two depths (0–15 and 15–30 cm) in three LK PLS Learning Innovation Platform (IP) sites (Bufundi in Uganda, Mupfuni-Shanga in D.R. Congo, Gataraga in Rwanda). Small scale agriculture has increased in all the benchmarked micro-catchments at the expense of other land-uses/covers. In the settlement areas land-use/cover distribution along the landscape varied across sites and countries; the major one being eucalyptus woodlots, wetland, and perennials and annuals crops in Bufundi; annuals and perennials crops in Mupfuni-Shanga; and annuals crops in Gataraga. Perennial crops tended to occur at the footslope and valley bottoms, while the annuals occurred at the upper backslopes and summits. Available P and K were relatively higher and C/N ratio (7.28) was the lowest in Mupfuni Shanga. Annual crops had the lowest available P and N across site (). The key nutrients N, P and K were below the critical values for plant growth for Bufundi.