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Accueil du site → Doctorat → Afrique du Sud → 2019 → Impact of adoption of drought tolerant maize varieties on yield in the face of climate change : A case of Salima, Chikwawa and Karonga districts, Malawi

University of Fort Hare (2019)

Impact of adoption of drought tolerant maize varieties on yield in the face of climate change : A case of Salima, Chikwawa and Karonga districts, Malawi

Rukasha, Conscience Tanyaradzwa

Titre : Impact of adoption of drought tolerant maize varieties on yield in the face of climate change : A case of Salima, Chikwawa and Karonga districts, Malawi

Auteur : Rukasha, Conscience Tanyaradzwa

Université de soutenance : University of Fort Hare

Grade : Doctor of Philosophy (PhD) in Agricultural Economics 2019

Résumé
Drought is a huge limiting factor in maize production, mainly in the rain-fed agriculture of subSaharan Africa. In response to this threat, drought-tolerant (DT) maize varieties have been developed with an aim to ensure maize productivity under drought conditions. This study assessed the impact of smallholder farmers’ adoption of DT maize varieties on maize productivity. The first step into understanding the impact of adoption of these varieties on smallholder farmers’ productivity was to first identify the varieties that they were growing. To achieve this, data was collected through the means of a household survey of 600 farmers from Karonga, Chikwawa and Salima districts in Malawi. The major findings drawn were that though most of the farmers have adopted the use of hybrids, as they are fairly common among the varieties that are being grown, most of these hybrids were not drought tolerant varieties. Previous studies had concluded that most of the farmers in Malawi were still growing local varieties. Results from this study showed a major increase in the use of hybrids with SC403 being the most grown variety. The second step in the analysis of the impact of DT maize adoption was to analyse the level and intensity of adoption of these varieties among the smallholder farmers. This was done using a Double Hurdle Model. The results from the double hurdle showed that only 23% of the sampled farmers were growing one or more DT varieties on their plots. Generally, farmers’ decision to use improved agricultural technologies and the intensity of the use in a given period of time are hypothesized to be influenced by a combined effect of various factors such as household characteristics, socioeconomic and physical environments in which farmers operate. The results in this study have shown that the geographical location of farmers plays a significant role in the decision to adopt as well as off-farm income and input subsidies. In terms of intensity, the results revealed that the farmers allocated an average of 0.46 ha of their land under maize cultivation to DT varieties. The results also showed that the intensity of adoption was influenced by gender, household size, whether or not the farmer is recycling the seed and soil fertility. The next step in the study was analysing the impact that intra-seasonal weather variability had on maize productivity.

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