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| Engler,Alejandra; del Pozo,Alejandro. |
| Cereal grain yields have increased worldwide during the 20th century as a consequence of plant breeding, improved cultural practices and intensive use of inputs. However, there is evidence that there are differences in yield pattern evolution across countries and cereals. The purpose of this study was to compare trends in the yields of the most commonly produced cereals in Chile, namely wheat, oat, barley, maize and rice, to identify similarities in trends across crops and to estimate long-term growth rates in the yields and their changes over time. Data for wheat, barley, oat, rice and maize yields between 1929 and 2009 were obtained from the Chilean Oficina de Estudios y Políticas Agrarias (ODEPA). A first-order autoregressive (AR1) model with trend was... |
| Tipo: Journal article |
Palavras-chave: Barley; Oat; Maize; Rice; Wheat; Yield progress. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000100005 |
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| 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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| 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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| Govereh, Jones; Jayne, Thomas S.; Chapoto, Antony. |
| The economic reforms in maize marketing and trade policies implemented during the 1990s have been highly controversial, and there remains a lack of solid empirical investigation on the impacts of these reforms on national food security, price stability and rural income growth. This study aims to provide a detailed evidence-based analysis of the impacts of maize marketing and trade policies on smallholder agricultural production growth, access to food by consumers, and other important national policy objectives. These insights from Zambia can hopefully move forward the continuing debate in the region on how maize marketing and trade policies should be structured in the future. |
| Tipo: Report |
Palavras-chave: Food security; Policy; Zambia; Africa; Maize; Trade; Crop Production/Industries; Marketing; Q18. |
| Ano: 2008 |
URL: http://purl.umn.edu/54492 |
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| Langyintuo, Augustine S.; Setimela, Peter S.. |
| The publication describes outcomes of a study to assess the effectiveness of a large-scale crop seed relief effort in Zimbabwe during 2003-07. Aims of the effort, which was supported by the British Department for International Development (DfID) and coordinated by the Food and Agricultural Organization (FAO) regional office in Harare, included broader diffusion of open-pollinated maize varieties (OPVs), as opposed to hybrids. Based on the findings of the study, the authors recommend that, to increase benefits to vulnerable groups, participants in such efforts should effectively disseminate information on selecting and recycling seed, supported by training and field demonstrations, and should target relatively well-endowed farmers initially. Recommendations... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Agricultural development; Technical aid; Farm income; Food production; Maize; Open pollination; Hybrids; Zimbabwe; Crop Production/Industries; International Development. |
| Ano: 2007 |
URL: http://purl.umn.edu/7655 |
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| Kabwe, Stephen; Donovan, Cynthia; Samazaka, David. |
| This research focuses on the performance in the Magoye ripper in maize and cotton production in Eastern and Southern Provinces during the 2004/2005 productions year. Findings include the following: In maize production, the ripper enabled higher yields compared to traditional animal ploughing, by increasing the effectiveness of nitrogen fertilizer applications, resulting in net profits per hectare of ZK575,800 in Eastern Province and ZK93,800 in Southern Province; In cotton, the input applications and size of fields were the most important determinants of yield, and the ripper had no significant individual effect. Farmers using the ripper indicated that it helped conserve water, enabled early land preparation and early planting; and Farmers not using their... |
| Tipo: Report |
Palavras-chave: Food security; Food policy; Zambia; Maize; Cotton; Inputs; Crop Production/Industries; Q18. |
| Ano: 2006 |
URL: http://purl.umn.edu/54623 |
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| Registros recuperados: 1.103 | |
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