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Registros recuperados: 27
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ADOPTION OF MAIZE AND WHEAT TECHNOLOGIES IN EASTERN AFRICA: A SYNTHESIS OF THE FINDINGS OF 22 CASE STUDIES AgEcon
Doss, Cheryl R.; Mwangi, Wilfred; Verkuijl, Hugo; De Groote, Hugo.
This paper synthesizes the findings of 22 micro-level studies on technology adoption carried out by the International Maize and Wheat Improvement Center (CIMMYT) with national agricultural research systems in Ethiopia, Kenya, Tanzania, and Uganda from 1996-1999. The authors found that technology adoption is taking place across Eastern Africa but considerable scope remains to improve the productivity of smallholder agriculture in higher potential regions with high levels of adoption. Extension was the variable most highly correlated with technology adoption, and extension services continue to play an important role in disseminating information on new varieties and how to manage them. Despite the usefulness of the micro-study results, especially for priority...
Tipo: Working or Discussion Paper Palavras-chave: Maize; Wheat; Innovation adoption; Technology transfer; Plant Breeding; Small farms; Case studies; Fertilizers; Private sector; Nongovernmental organizations; Research institutions; International organizations; Kenya; Tanzania; Uganda; Farm Management.
Ano: 2003 URL: http://purl.umn.edu/46522
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Adoption of Maize Production Technologies in the Coastal Lowlands of Kenya AgEcon
Wekesa, E.; Mwangi, Wilfred; Verkuijl, Hugo; Danda, Milton Kengo; De Groote, Hugo.
Maize is the major food crop grown in the coastal region of Kenya and constitutes a major component of the diet of the population in the region. However, average yields are far below the potential for the region and low production levels create serious food deficits. Over the years, new technologies have been introduced but adoption has remained low, especially for fertilizer. This paper examined current maize-farming practices and technological and socioeconomic factors that influenced adoption in the Kilifi and Kwale Districts of the Coast Province, that together account for half of maize production in the region. The study found low adoption levels for improved maize varieties and technology, especially fertilizer, among farmers in the area. Farmers...
Tipo: Report Palavras-chave: Maize; Crops; Innovation adoption; Technology transfer; Food production; Production economics; Production factors; Plant breeding; Fertilizers; Yields; Kenya; Crop Production/Industries; E14; E16.
Ano: 2003 URL: http://purl.umn.edu/56109
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Assessing rural consumers’ WTP for orange, biofortified maize in Ghana with experimental auctions and a simulated radio message AgEcon
De Groote, Hugo; Tomlins, Keith; Haleegoah, Joyce; Awool, Manfred; Frimpong, Benedicta; Banerji, Abijit; Chowdury, Shyamal K.; Meenakshi, J.V..
Deficiencies of micronutrients such as vitamin A are widespread, expecially in Africa. Biofortified crops such as maize, bred for high levels of provitamin A might offer a solution, but these crops are often bright orange, and African maize consumers prefer white. To estimate the consumers interest in orange biofortified maize, sensory evaluations were organized in rural Ghana with white, yellow and orange maize. The effect of information on willingness to pay for biofortification was estimated using a simulated radio message. Results indicate that color preferences are highly regional, wide variation exist within regions, and the provision of information is able to change these preferences. The color of biofortified maize should therefore not be seen as...
Tipo: Journal Article Palavras-chave: Maize; Biofortification; Consumers; Experimental auction; Sensory evaluation; Crop Production/Industries; Demand and Price Analysis.
Ano: 2010 URL: http://purl.umn.edu/96197
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ASSESSING THE POTENTIAL IMPACT OF BT MAIZE IN KENYA USING A GIS BASED MODEL AgEcon
De Groote, Hugo; Overholt, William; Ouma, James Okuro; Mugo, Stephen.
The Insect Resistant Maize for Africa (IRMA) project is currently developing Bt maize for Kenya. So far, Bt genes with resistance to Chilo partellus, Chilo orichalcociliellus, Eldana Sacharina, and Sesamia calamistis, four of the five major stemborers were successfully incorporated into elite CIMMYT maize inbred line (CML216) and tested in insect bioassays in Kenya. Participatory Rural Appraisals showed that stem borers are indeed a major pest problems for farmers. Four seasons of on-farm crop loss assessment showed an average crop loss of 13.5%, or 0.4 million tons, valued at US$ 80 million. If the project manages to find a Bt gene that is effective to the fifth stemborer, Busseola fusca, adoption rates are likely to be high, and therefore the returns....
Tipo: Conference Paper or Presentation Palavras-chave: Maize; Africa; Genetically Modified Crops; Bt crops; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2003 URL: http://purl.umn.edu/25854
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Comparing Accuracy and Costs of Revealed and Stated Preferences: The Case of Consumer Acceptance of Yellow Maize in East Africa AgEcon
Kimenju, Simon Chege; De Groote, Hugo; Morawetz, Ulrich B..
For quite a while, stated preferences have been a major tool to measure consumer preferences for new products and services. Revealed preference methods, in particular experimental economics, have gained popularity recently because they have been shown to be more incentive compatible, and therefore more accurate. However, this advantage comes at the expense of higher survey costs. In the developing countries with limited funding for research, it is important to determine whether the extra cost can be justified by the extra gain in accuracy. A survey of 100 farmers was carried out in Western Kenya to determine consumer preference for yellow maize using the contingent valuation, choice experiments and experimental auction methods. Experimental auctions...
Tipo: Conference Paper or Presentation Palavras-chave: Kenya; Maize; Consumer; Experimental auctions; Stated preference; WTP; Crop Production/Industries; Food Consumption/Nutrition/Food Safety; D6; Q12.
Ano: 2006 URL: http://purl.umn.edu/25642
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Consulting the stakeholders on pro-poor market segmentation of maize seed in Africa AgEcon
De Groote, Hugo; Andam, Kwaw S.; Hall, Mike; Munyua, Bernard Gathigi; Ngigi, Obadiah; Spielman, David J..
Paper accepted for presentation at the 27th Conference of the International Association of Agricultural Economists (IAAE), Beijing China, August 16-22, 2009, (Ref 690)
Tipo: Conference Paper or Presentation Palavras-chave: Maize; Market segmentation; Seed; Agricultural and Food Policy; Crop Production/Industries; International Development.
Ano: 2009 URL: http://purl.umn.edu/51753
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Consumers' Willingness to Pay for Genetically Modified Foods in Kenya AgEcon
Kimenju, Simon Chege; De Groote, Hugo.
A survey of 600 consumers was conducted in Nairobi to determine attitudes and willingness to pay (WTP) for GM maize meal. WTP was estimated using the double-bounded logit model. Overall, 38% are aware of GM crops. Most consumers believe in the technology's positive impacts, but are concerned about environmental and health risks. Majority (68%) would buy GM maize meal at the price of their favourite maize meal brand. The mean WTP for GM maize meal is KShs 58 for a 2kg packet, a premium of 13.7 % over mean average price of favourite brands. WTP is influenced more by subjective than socioeconomic characteristics.
Tipo: Conference Paper or Presentation Palavras-chave: GMO; Biotechnology; Consumer; Africa; Maize; Consumer/Household Economics; D12; C25; Q16.
Ano: 2005 URL: http://purl.umn.edu/24504
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CROP BIOTECHNOLOGY FOR AFRICA: WHO WILL GAIN FROM BT MAIZE IN KENYA? AgEcon
Owuor, George; Smale, Melinda; De Groote, Hugo.
Bt maize in Kenya is promising biotechnology innovation for poor households. Econometric prediction from a trait-based model of variety adoption indicates that the choice of host variety has equity and efficiency implications related to heterogeneity in maize growing environments and pest pressures, as well as the differences among farm households in terms of wealth, income, and market access.
Tipo: Conference Paper or Presentation Palavras-chave: Maize; Bt; Adoption; Area allocation; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2004 URL: http://purl.umn.edu/20379
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DEBUNKING THE MYTHS OF GM CROPS FOR AFRICA: THE CASE OF BT MAIZE IN KENYA AgEcon
Odhiambo, Benjamin; Bergvinson, David; Mugo, Stephen; De Groote, Hugo.
Empirical evidence from research on Bt maize in Kenya puts to rest most concerns raised against GMOs (not responding to farmers' needs, expensive, benefiting agro-business, risk of decreased biodiversity), but does indicate that contamination of local varieties is likely and buildup of insect resistance possible, requiring careful monitoring and evaluation.
Tipo: Conference Paper or Presentation Palavras-chave: GMO; Maize; Kenya; Risk; Environment; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2004 URL: http://purl.umn.edu/19918
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Determinants of Improved Maize Seed and Fertilizer Use in Kenya: Policy Implications AgEcon
Ouma, James Okuro; De Groote, Hugo; Owuor, George.
Maize is a key food crop in Kenya. While maize yields increased from 1.25 t ha-1 in early 1960s to over 2 tonnes in 1982, they fell below 1.5 t ha-1 in 2000. Given the limited land area, there is no doubt that Kenya will have to rely more on modern technologies for increased yields .Use of improved maize varieties and fertilizers will therefore continue to be critical inputs for improving productivity. To improve production, it is important to understand factors determining adoption and intensity of use of modern technologies. A stratified 2-stage sampling design was used to select 1800 households, subsequently interviewed by means of structured questionnaire. Econometric models were used to explore factors influencing adoption and intensity of use of the...
Tipo: Conference Paper or Presentation Palavras-chave: Maize; Adoption; Improved seed; Fertilizer; Credit; Extension; Kenya; Crop Production/Industries.
Ano: 2006 URL: http://purl.umn.edu/25433
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Does Land Use Patterns Matter for Bt-Maize: The Case of Maize Farming System in Kenya AgEcon
Muhammad, Lutta; Owuor, George; De Groote, Hugo; Kimenju, Simon Chege.
Population pressures and the need to optimize the use of limited available land has led to increasing cropping affluence levels within the maize agro-ecologies in Kenya, and a shift from large to smallholder intensification and multiple cropping patterns. Using a geographic information system, this study relates cropping patterns, by area share, maize productivity and household incomes across maize agro-ecologies, with the purpose to establish a decision support system for optimizing land allocation and in priority setting for introduction of new technologies such as Bt maize varieties. Results show that land use patterns and maize productivity in maize farming systems differ between agroecological zones. The high potential areas experience high maize...
Tipo: Conference Paper or Presentation Palavras-chave: Land use; Smallholders; Maize production; Food security; Kenya; Crop Production/Industries; Land Economics/Use.
Ano: 2006 URL: http://purl.umn.edu/25609
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Economic Analysis of Alternative Maize Storage Technologies in Kenya AgEcon
Kimenju, Simon Chege; De Groote, Hugo.
Upcoming technologies for maize storage have sometimes been promoted without being subjected to trials and economic analysis. In the recent past, new storage technologies, actellic super, super grain bag and the metal silo have been developed. In this paper, the results of crop loss trials are combined with measures of project worth to determine the attractiveness of investing in new storage technologies. Determination of the benefit was based on the amount of loss the new technology could abate. A one ton metal silo, with negligible % crop loss abated USD 100 in 12 months. These benefits were found to increase with time meaning that a farmer benefits by storing longer. Measures of project worth, the NPV and BCR were used to analyze the attractiveness of...
Tipo: Journal Article Palavras-chave: Storage; LGB; Economic analysis; Kenya; Crop Production/Industries.
Ano: 2010 URL: http://purl.umn.edu/96419
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Economics of Insecticide use and Potential for Bt Maize Varieties in the Control of Stalkborer in Kenya. AgEcon
Wanyama, Joseph M.; De Groote, Hugo; Mose, Lawrence Obae; Odendo, Martins; Ouma, James Okuro; Owuor, George; Lutta, M.; Ndung'U, J.; Mutoko, M.C..
Maize is the staple food crop and source of income for majority of the Kenyan population and many sub-Saharan African countries. The increasing Kenyan population demands an increase in maize production if intermittent food deficits have to be averted. Since the introduction of improved maize varieties in mid-1960, the start of Green Revolution period, maize yields increased drastically up to 1970s and started declining from 1980’s to-date. The key contributory factors are nutrient mining, sub-optimal input use and insect pest damage. Of the insect pests, stalk borer is of economic importance. Currently, KARI and CIMMYT are developing maize varieties that are tolerant to stalk borer damage. In order to evaluate the potential impact of these interventions...
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries.
Ano: 2004 URL: http://purl.umn.edu/9526
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Evaluating the Impact of Biofortification: A Meta-analysis of Community-level Studies on Quality Protein Maize (QPM) AgEcon
Gunaratna, Nilupa S.; De Groote, Hugo; McCabe, G.P..
Biofortification, or the genetic improvement of the nutritional quality of food crops, is a promising strategy to combat undernutrition, particularly among the rural poor in developing countries. However, traditional methods of impact assessment do not apply to biofortified crops as little or no yield increases are expected. Significant progress has been made to develop maize varieties with improved protein quality, collectively known as quality protein maize (QPM). Evidence for the impact of QPM at the community level, as demonstrated by randomized, controlled studies, was evaluated using meta-analysis. A new and generalizable effect size was proposed to quantify the impact of QPM on a key outcome, child growth. The results indicated that consumption of...
Tipo: Conference Paper or Presentation Palavras-chave: Impact assessment; Biofortification; Meta-analysis; Crop Production/Industries; Food Security and Poverty.
Ano: 2008 URL: http://purl.umn.edu/44166
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Extension and adoption of biofortified crops: Quality protein maize in East Africa AgEcon
De Groote, Hugo; Gunaratna, Nilupa S.; Ergano, Kebebe; Friesen, Dennis.
Biofortified crops, bred for improved nutritional quality, can alleviate nutritional deficiencies if they are produced and consumed in sufficient quantities. These varieties can be promoted based on their agronomic performance or based on their nutritional qualities. Quality protein maize (QPM) was the first biofortified crop and has been disseminated in Africa using both approaches. To study their effectiveness, a survey of rural households was conducted in the maize-growing areas of East Africa, comparing communities with access to QPM extension activities to control communities. The results show that a third to one half of the farmers in project communities participated in extension activities in all countries except Kenya. In these communities,...
Tipo: Journal Article Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 2010 URL: http://purl.umn.edu/96429
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HEALTH COSTS AND EXTERNALITIES OF PESTICIDE USE IN LOCUST AND GRASSHOPPER CONTROL IN THE SAHEL AgEcon
Houndekon, Victorin A.; De Groote, Hugo.
To evaluate the economic cost of classical chemical control of locusts, externalities of chemical pesticides in the Sahel are estimated through a farmer survey. The costs of human health, losses in domestic animals and of destroying obsolete pesticides are estimated at $4 per treated ha for chemical control.
Tipo: Conference Paper or Presentation Palavras-chave: Environmental Economics and Policy; Health Economics and Policy.
Ano: 1998 URL: http://purl.umn.edu/20966
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Improving the Use of Experimental Auctions in Africa: Theory and Evidence AgEcon
Morawetz, Ulrich B.; De Groote, Hugo; Kimenju, Simon Chege.
Experimental auctions have not been widely used in Africa. However, auctions are important tools for evaluating new products and technologies. To increase the quality of these experiments, we explore an alternative first-price bidding mechanism that is more similar to African market exchanges and we analyze factors likely to affect bidding. Experiments with African consumers show that the proposed first-price mechanism has no advantage over conventional second-price mechanisms. Results show high and significant cash-in-hand, experimenter, and time of day effects in main rounds, and significant ordering effects in test rounds. These effects need to be carefully considered when applying the Becker-DeGroot-Marschak mechanism in Africa.
Tipo: Journal Article Palavras-chave: Africa; BDM mechanism; Experimenter effect; First-price auction; Income effect; Order effect; Time of day effect; Research Methods/ Statistical Methods.
Ano: 2011 URL: http://purl.umn.edu/117161
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Linking Farmers to Markets: The Case of Grain Marketing Information in Western Kenya AgEcon
Odendo, Martins; De Groote, Hugo.
Market liberalization created a situation where there are no guaranteed grain prices, no central information source and the need for marketing information increased. Unfortunately, most farmers have little or no access to marketing information. This study evaluates farmers’ perceptions of importance of marketing information; identifies farmers’ sources of grain marketing information; determine farmers’ confidence in and use of marketing information; and assesses determinants farmers’ willingness (WTP) to pay for marketing information. Data used in this study were generated using a structured questionnaire in a survey that covered a random sample of 120 households in traditionally grain surplus-and deficit zones of Kenya. The data were analyzed by...
Tipo: Conference Paper or Presentation Palavras-chave: Farmer; Grains; Logit; Markets.; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; International Relations/Trade; Marketing; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies.
Ano: 2008 URL: http://purl.umn.edu/52144
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Market Liberalization and Agricultural Intensification in Kenya (1992-2002) AgEcon
De Groote, Hugo; Kimenju, Simon Chege; Owuor, George; Wanyama, Japheter.
This study analyses the impact of the liberalization on the intensification of maize production in Kenya. It first analyses the impact of liberalization on input and output prices, followed by an analysis of farmer practices comparing two major farmer surveys, from 1992 and 2002. The results show that liberalization has had a general positive impact on the evolution of prices, with a decrease of input/output price ratios. However, fluctuations of maize prices has become very high and, combined with a decrease of marketing by the marketing board, has increased the uncertainty in maize production. The liberalization has also resulted in a decrease in extension services. Fortunately, farmers have an increased access to credit services. The combined effect of...
Tipo: Conference Paper or Presentation Palavras-chave: Liberalization; Intensification; Adoption; Maize; Africa; International Development; International Relations/Trade.
Ano: 2006 URL: http://purl.umn.edu/25419
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Participatory Evaluation of Integrated Pest and Soil Fertility Management Options Using Ordered Categorical Data Analysis AgEcon
Rutto, Esther; De Groote, Hugo; Vanlauwe, Bernard; Kanampiu, Fred; Odhiambo, George D.; Khan, Zeyaur R..
During participatory rural appraisals, farmers at the Lake Victoria basin of Kenya and Uganda identified Striga, stemborer and declining soil fertility as three major constraints to maize production To reduce food insecurity, several innovative integrated technologies to address these constraints have been developed, including push-pull (maize intercropped with Desmodium and surrounded by napier grass), maize-soybean and maize-crotalaria rotations, and Imazapyrresistant (IR) maize seed coated with the herbicide. To let farmers evaluate the new technologies, 12 demonstration trials, comparing the different technologies, were established in four villages in Siaya and Vihiga districts (Western Kenya) and two villages in Busia (Uganda). These evaluations,...
Tipo: Conference Paper or Presentation Palavras-chave: Farmers' preference; Technologies; Ordinal regression; Crop Production/Industries.
Ano: 2006 URL: http://purl.umn.edu/25317
Registros recuperados: 27
Primeira ... 12 ... Última
 

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