Land suitability evaluation to optimize land management of small-scale farms in the Gerado catchment, North-Eastern Ethiopia

Bahir, Asmamaw L. and Ahmed, Mohammed A. and Antille, Diogenes L. (2015) Land suitability evaluation to optimize land management of small-scale farms in the Gerado catchment, North-Eastern Ethiopia. Tropical Agriculture, 92 (1). pp. 49-68. ISSN 0041-3216

Abstract

Biophysical and socio-economic constrains, and sub-optimal utilization of soil and water resources have resulted in progressive reduction of land productivity in Ethiopia. This study investigated the suitability of land mapping units of the Gerado catchment for subsistence rainfed cultivation of wheat (Triticum aestivum L.), maize (Zea mays L.) and teff (Eragrostis tef Zucc.). A land resource survey was conducted and it identified nine different land mapping units (LMU). The FAO maximum limitation method was used to assess LMU and determine land suitability subclasses. The study indicated that soil erosion, soil wetness, soil fertility status, and soil workability were the main limiting factors affecting land quality within the catchment. We suggest that drainage using traditional ditches may be a cost-effective method to reduce the incidence of waterlogging conditions. Long-term fertility management requires the implementation of suitable fertilization programmes that consider the use of organic materials such as manure and compost. Such programmes need to account for nutrient budgets over the entire crop rotation to maximize use efficiency and minimize environmental losses. Soil erosion may be mitigated through stone terracing, soil bunding and by adopting a more conservative approach to agriculture, that is, by matching land use with land capability based on the correct assessment of land suitability. Implementation of the proposed approach to optimizing land management in the Gerado catchment will deliver a range of socio-economic and agri-environmental benefits to the local communities.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: Current - USQ Other
Date Deposited: 02 Jun 2016 06:09
Last Modified: 03 Jun 2016 00:24
Uncontrolled Keywords: environmental quality; land-use optimization; land capability; small-scale farming; sustainable soil management; tropical rainfed subsistence-agriculture
Fields of Research : 05 Environmental Sciences > 0503 Soil Sciences > 050302 Land Capability and Soil Degradation
Socio-Economic Objective: D Environment > 96 Environment > 9614 Soils > 961402 Farmland, Arable Cropland and Permanent Cropland Soils
D Environment > 96 Environment > 9614 Soils > 961405 Mountain and High Country Soils
URI: http://eprints.usq.edu.au/id/eprint/29221

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