Person: Marenya, P.P.
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Marenya
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P.P.
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Marenya, P.P.
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0000-0003-2496-23037 results
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- Harnessing innovation and data for last-mile seed delivery(CIMMYT, 2024) Ojiewo, C.O.; Gichuru, L.; Templer, N.A.; Puozaa, D.K.; Narmandakh, D.; Marenya, P.P.
Publication - Buffering the effect of extreme drought in Zambia: new crops and advisories are helping farmers(CIMMYT, 2024) Mulungu, K.; Ngoma, H.; Marenya, P.P.; Snapp, S.S.
Publication - Reducing susceptibility to drought under growing conditions as set by farmers: The impact of new generation drought tolerant maize varieties in Uganda(Frontiers, 2023) Habte, E.; Marenya, P.P.; Beyene, F.; Bekele, A.
Publication - Building resilient maize production systems with stress-adapted varieties: Farmers' priorities in western Kenya(Frontiers, 2022) Marenya, P.P.; Wanyama, R.; Alemu, S.; Woyengo, V.
Publication - What explains the gender differences in the adoption of multiple maize varieties? Empirical evidence from Uganda and Tanzania(Elsevier, 2020) Teklewold, H.; Adam, R.; Marenya, P.P.
Publication - Heterogeneous seed access and information exposure: implications for the adoption of drought-tolerant maize varieties in Uganda(Springer, 2019) Simtowe, F.P.; Marenya, P.P.; Amondo, E.; Regasa, M.W.; Rahut, D.B.; Erenstein, O.Frequent droughts in sub-Saharan Africa imply water stress for rainfed agriculture and, ultimately, food insecurity, underlining the region’s vulnerability to climate change. Yet, in the maize-growing areas, farmers have been given new drought coping options following the release and availability of drought-tolerant maize varieties (DTMVs). These varieties are being disseminated through the National Agricultural Research and Extension Systems in collaboration with seed companies; however, their adoption still appears somewhat modest, and empirical studies on their adoption potential and associated drivers are scarce. We use empirical data from Uganda to estimate the actual and potential adoption rates and the adoption determinants of DTMVs under information and seed access constraints. Adoption rates for DTMVs could have been up to 22% in 2015 instead of the observed sample adoption rate of 14% if the whole population had been exposed to them. The adoption rate could increase to 30% if seed were availed to the farming population and to 47% if seed were sold at a more affordable price to farmers. The observed adoption rate of 14% implies gaps in the potential adoption rates of 8%, 16%, and 33% because of a lack of awareness, a lack of seed access, and high seed prices, respectively. The findings underscore the role of both market and non-market-based approaches and the potential to further scale the cultivation of DTMVs in Uganda.
Publication - Characteristics of maize cultivars in Africa: How modern are they and how many do smallholder farmers grow?(Springer Verlag, 2017) Abate, T.; Fisher, M.; Abdoulaye, T.; Kassie, G.; Lunduka, Rodney; Marenya, P.P.; Asnake, W.Maize is the most important cereal and most widely cultivated staple that plays a key role in the food security of sub-Saharan Africa (SSA). Although some countries have achieved significant gains in maize productivity, the SSA average yields are far below what could be obtained with improved cultivars under good crop management. Low cultivar turnover is one among many contributing factors to low maize yields in SSA. At present, there is a critical knowledge gap on the identity, number, and age of maize cultivars currently grown by smallholder farmers on the continent. This study revealed that nearly 500 maize cultivars were grown in 13 African countries surveyed in the 2013/2014 main crop season. Sixty-nine percent of the cultivars each occupied <1% of the total maize area; only two cultivars occupied >40% and four occupied >30% area. Approximately 32% of all the cultivars were hybrids, 23% were improved open-pollinated varieties (OPVs), and 46% were locals. Eastern Africa (EA) and southern Africa (SA) accounted for about 43 and 38%, respectively, of all the cultivars reported, whereas West Africa’s (WA) share was 19%. The average area planted to modern cultivars in the surveyed areas was estimated at 57%—with EA, SA, and WA estimates of 82, 55, and 36%, respectively; however, increased adoption was not necessarily always related to improved productivity, as the latter depends on many additional factors. Each household planted an average of 1.781 cultivars (range 1–8). The overall weighted average age of the cultivars was 15 years, with hybrids and OPVs being 13 and 18 years, respectively. Conclusions: Maize variety turnover in SSA is slower than what is practiced in the USA and other world regions such as Latin America and Asia. The substantial variations among regions and countries in all parameters measured suggest a tailored approach to mitigation interventions. Findings of this current study pave the way for replacing the old cultivars with more recent releases that are tolerant or resistant to multiple stresses and are more resilient.
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