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Botswana University of Agriculture and Natural Resources (BUANR) 2013

Relating sorghum yield to growing seasonal weather conditions for Chobe and Barolong agricultural district, Botswana

Tjitemisa, Jeomba Mavis

Titre : Relating sorghum yield to growing seasonal weather conditions for Chobe and Barolong agricultural district, Botswana

Auteur : Tjitemisa, Jeomba Mavis

Université de soutenance : Botswana University of Agriculture and Natural Resources (BUANR)

Grade : Master of Science MSc Agricultural Engineering 2013

Résumé partiel
Growing season rainfall is the most important factor in rain-fed arable agriculture in semi-arid climates. Knowledge of rainfall distribution is needed to make farmers aware of possible crop yield obtainable during and at the end of growing season and also help governments with information for the attainable of food security. The goal of this study was to examine the relationship between crop yield and growing season rainfall distribution in an attempt to contribute to food security early warning system. Specifically, the study determined the relationship between total seasonal rainfall, total number of rainy days, average maximum temperature and sorghum yield. The established relationship was then used to determine the most sensitive growth stage (s) for yield loss. The study explored the relationship between seasonal rainfall distribution and total seasonal rainfall with crop yield for Chobe agricultural district and Barolong agricultural sub-district In genera), seasonal rainfall showed a negative slope while sorghum yield had a positive gradient for Chobe agricultural district. For Barolong agricultural sub-district, a positive trend was observed in both seasonal rainfall and sorghum yield. Number of rainy days and sorghum yield indicated a positive slope for Chobe agricultural district while for Barolong agricultural sub-district, a negative slope in rainy days was observed while sorghum yield had a positive gradient. Exploratory results show that sorghum yield fluctuated with rainfall. Over the years, rainfall and sorghum yield fluctuated for both districts.

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Page publiée le 25 décembre 2022