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Linking field survey with crop modeling to forecast maize yield in smallholder farmers’ fields in Tanzania

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  • Lin Liu

    (Michigan State University)

  • Bruno Basso

    (Michigan State University
    Michigan State University)

Abstract

Short term food security issues require reliable crop forecasting data to identify the population at risk of food insecurity and quantify the anticipated food deficit. The assessment of the current early warning and crop forecasting system which was designed in mid 80’s identified a number of deficiencies that have serious impact on the timeliness and reliability of the data. We developed a new method to forecast maize yield across smallholder farmers’ fields in Tanzania (Morogoro, Kagera and Tanga districts) by integrating field-based survey with a process-based mechanistic crop simulation model. The method has shown to provide acceptable forecasts (r2 values of 0.94, 0.88 and 0.5 in Tanga, Morogoro and Kagera districts, respectively) 14–77 days prior to crop harvest across the three districts, in spite of wide range of maize growing conditions (final yields ranged from 0.2–5.9 t/ha). This study highlights the possibility of achieving accurate yield forecasts, and scaling up to regional levels for smallholder farming systems, where uncertainties in management conditions and field size are large.

Suggested Citation

  • Lin Liu & Bruno Basso, 2020. "Linking field survey with crop modeling to forecast maize yield in smallholder farmers’ fields in Tanzania," Food Security: The Science, Sociology and Economics of Food Production and Access to Food, Springer;The International Society for Plant Pathology, vol. 12(3), pages 537-548, June.
    • Handle: RePEc:spr:ssefpa:v:12:y:2020:i:3:d:10.1007_s12571-020-01020-3
    DOI: 10.1007/s12571-020-01020-3
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    References listed on IDEAS

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    Cited by:

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    2. Patrick L. Hatzenbuehler & George Mavrotas, 2021. "Combining household and price data to target food marketing interventions in Nigeria," Food Security: The Science, Sociology and Economics of Food Production and Access to Food, Springer;The International Society for Plant Pathology, vol. 13(2), pages 493-505, April.

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