Application of low-cost irrigation technologies in agricultural areas that are cultivated during extended droughts - Brazil/Africa partnership

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One of the challenges smallholders in Northern Ethiopia face is improving food security in periods of low rainfall supply by identifying strategies to restore soil water stocks. In that region, over 50% of the water available for agriculture is lost due to issues like direct evaporation, surface runoff and deep drainage. The hypothesis is that the use of low cost technologies and intelligent solutions to identify strategies for water resupply and/or water storage in low cost containers like ceramic vases (clay pots) could significantly reduce water losses due to evaporation and drainage. In addition, studying the performance of any irrigation system requires measuring evapotranspiration rates (ET), monitoring phenological stages, and estimating crop growth rates and yields. There are several types of techniques to measure evapotranspiration, such as lysimeters, the Bowen ratio method, eddy covariance, scintillometry, sap flow, estimations using remote sensing techniques and surface renewal measurements . Out of the ET measurement techniques, the surface renewal method was found to be the one with the lowest real-time (daily) cost and easily used by extension agents or farmers. However, the technique is relatively new and has not been widely tested yet. Therefore, before their dissemination, such technologies need to be standardized and tested. The main goal of this research is to conceive suitable buried clay plot irrigation technology, considering their technical and economic viability in field conditions in study areas, in order to inform strategies to cope with droughts in current conditions and in climate change scenarios.

Status: Completed Start date: Sat Aug 01 00:00:00 GMT-03:00 2015 Conclusion date: Mon Jul 31 00:00:00 GMT-03:00 2017

Head Unit: Embrapa Eastern Amazon

Project leader: Lucieta Guerreiro Martorano

Contact: lucieta.martorano@embrapa.br