Sokoine University of Agriculture

Modeling potential rain-fed maize productivity and yield gaps in the Wami river sub-basin, Tanzania

Show simple item record

dc.contributor.author Mourice, S. K.
dc.contributor.author Tumbo, S. D.
dc.contributor.author Nyambilila, A
dc.contributor.author Rwehumbiza, C. L.
dc.date.accessioned 2017-06-23T16:26:19Z
dc.date.available 2017-06-23T16:26:19Z
dc.date.issued 2014-11-05
dc.identifier.issn 0906-4710
dc.identifier.uri https://www.suaire.sua.ac.tz/handle/123456789/1678
dc.description Acta Agriculturae Scandinavica, Section B — Soil & Plant Science 2015, Vol. 65(2): 132–140 en_US
dc.description.abstract The cause for low maize yields in rain-fed production systems is usually associated with water stress due to perceived suboptimal seasonal precipitation. A modeling study using Agricultural Model Intercomparison and Improvement Project modeling framework was conducted to determine the magnitude of rain-fed potential yield and yield gap of maize in the Wami River sub-basin, Tanzania. Primary and secondary data on soils, weather, management, and crop yields and cultivars were used. Data matrix search technique was used to calibrate CERES-Maize Crop System model against reported yield for each of 168 farms involved in this study. Then the individual farms’ simulated yields, actual reported yields, and the resultant yield gaps were aggregated into ward-level averages. Model calibration was robust as there was a very close agreement between reported and simulated yield (R2 = 0.9). Actual yields reported from farm survey ranged from 50 kg ha−1 to 3600 kg ha−1 with an average of 860 kg ha−1. Simulated rain-fed potential yield was between 2073 kg ha−1 and 5443 kg ha−1 and a mean of 4033 kg ha−1. It is apparent therefore that there exists a wide maize yield gap of 79% with current management under rain-fed conditions. This suggests that there is a large scope of improving maize yields under rain-fed conditions. Narrowing the yield gaps would require an intensive soil fertility improvement in the study area. en_US
dc.language.iso en en_US
dc.publisher Acta Agriculturae Scandinavica, Section B — Soil & Plant Science en_US
dc.subject AgMIP framework en_US
dc.subject CERES-Maize en_US
dc.subject Crop modeling en_US
dc.subject Rain-fed agriculture en_US
dc.subject Yield en_US
dc.title Modeling potential rain-fed maize productivity and yield gaps in the Wami river sub-basin, Tanzania en_US
dc.type Article en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search SUA IR


Browse

My Account

Statistics