Teff (Eragrostis tef) production constraints on Vertisols in Ethiopia: farmers' perceptions and evaluation of low soil zinc as yield-limiting factor
Open Access
- 1 August 2011
- journal article
- research article
- Published by Taylor & Francis Ltd in Soil Science and Plant Nutrition
- Vol. 57 (4), 587-596
- https://doi.org/10.1080/00380768.2011.593482
Abstract
Teff (Eragrostis tef (Zucc.) Trotter) is a major food crop in Ethiopia and Eritrea. It is well adapted to Vertisols. Yields are low (around 1000 kg ha−1) despite fertilization with urea and diammonium phosphate. The objectives of this study were to understand farmers’ perception on teff production constraints and to evaluate on-farm yield response of teff to zinc (Zn) fertilization. We conducted a farm survey and a participatory fertilization experiment in three teff-based sites (peasant associations) on Vertisols in the mid highland and lowland agroecological zones in Ethiopia. Per site 10 farmers participated in the survey and on-farm experiment. Poor soil fertility in the mid highland and moisture deficit in the lowland agroecological zones were mentioned by farmers as major teff production constraints, respectively. On-farm application of Zn fertilizer at a rate of 8 kg Zn ha−1 increased teff grain and straw yields by 14% and 15% on average, respectively, which could be economically profitable. Not all plots showed a positive response, however, indicating the necessity for enhanced insight in indicators for soil Zn bioavailability as a yield-limiting factor. Our study indicates the importance of Zn in teff production on Vertisols. We propose further research on management options to prepare for effective interventions based on the farm survey and on-farm experiment.Keywords
This publication has 19 references indexed in Scilit:
- Geochemical Modeling of Zinc Bioavailability for RiceSoil Science Society of America Journal, 2010
- Identifying Populations at Risk of Zinc Deficiency: The Use of Supplementation TrialsNutrition Reviews, 2009
- Distribution of Total and DTPA‐Extractable Zinc, Copper, Manganese, and Iron in Vertisols of IndiaCommunications in Soil Science and Plant Analysis, 2006
- Content of zinc, iron, calcium and their absorption inhibitors in foods commonly consumed in EthiopiaJournal of Food Composition and Analysis, 2005
- PARTICIPATORY ON-FARM CONSERVATION TILLAGE TRIAL IN THE ETHIOPIAN HIGHLAND VERTISOLS: THE IMPACT OF POTASSIUM APPLICATION ON CROP YIELDSExperimental Agriculture, 2004
- Soil Chemical Properties Controlling Zinc2+ Activity in 18 Colorado SoilsSoil Science Society of America Journal, 2002
- Sustainable nutrient management of Vertisols.Published by CABI Publishing ,2001
- Zinc supplementation and stunted infants in Ethiopia: a randomised controlled trialThe Lancet, 2000
- Zinc desorption kinetics as influenced by pH and phosphorus in soilsCommunications in Soil Science and Plant Analysis, 1999
- Zinc speciation in phosphate‐affected soilsCommunications in Soil Science and Plant Analysis, 1997