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Comparing Farm and Village-Level Determinant of Millet Diversity in Marginal Environments of India: The Context of Seed Systems AgEcon
Nagarajan, Latha; Smale, Melinda; Glewwe, Paul.
The purpose of the research paper is to characterize biological diversity related to millets in the semi-arid regions of India at various spatial scales of analysis (e.g., farm household versus community levels) and place that evidence in a broader seed systems (includes both formal and informal) context. An important finding of this research is that producer access to millet genetic resources is affected by the extent to which seed is traded via formal markets or through other social institutions, along with farm and household characteristics. Findings also underscore the need for an enhanced theoretical understanding of local seed markets in analyzing crop variety choices and the diversity of materials grown in less favored environments.
Tipo: Working or Discussion Paper Palavras-chave: Millet diversity; Seed systems; Local markets; Crop diversity; Biological diversity; Crop Production/Industries.
Ano: 2005 URL: http://purl.umn.edu/59235
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Contribution of Wheat Diversity to Total Factor Productivity in China AgEcon
Jin, Songqing; Meng, Erika C.H.; Hu, Ruifa; Rozelle, Scott; Huang, Jikun.
The impact of wheat diversity on the productivity of wheat in China is examined using total factor productivity (TFP) and an instrumental variable approach. TFP in seven key wheat-producing provinces in China shows significant, though variable, growth for all provinces during the period 1982-1995. Analysis of the causes of TFP growth tests alternative taxonomies of wheat diversity (named varieties and morphological groups) and three measures of diversity. The analysis shows significant effects of diversity on TFP with results consistent across taxonomies and measures of diversity. Further decomposition of the estimation results confirms the relative magnitude of impact of wheat diversity on TFP growth.
Tipo: Journal Article Palavras-chave: Agricultural productivity; China; Crop diversity; Diversity index; Total factor productivity; Wheat; Crop Production/Industries; Production Economics.
Ano: 2008 URL: http://purl.umn.edu/46555
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Determinants of crop diversity and composition in Enset-coffee agroforestry homegardens of Southern Ethiopia JARTS
Abebe, Tesfaye.
Households in much of the tropics depend for their livelihoods on the variety and continued production of food and other products that are provided by their own farms. In such systems, maintenance of agrobiodiversity and ensuring food security are important for the well being of the population. The enset-coffee agroforestry homegardens of Southern Ethiopia that are dominated by two native perennial crops, Coffee (Coffea arabica L.) and Enset (Enset ventricosum Welw. Cheesman), are examples of such agricultural systems. This study was conducted in Sidama administrative zone of Southern Ethiopia to determine the factors that influence the diversity and composition of crops in the systems. Data were collected from 144 sample homegardens selected from four...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agronomy and crop Science; Agroforestry; Agroecology; Agroforestry systems; Coffee; Crop diversity; Enset; Homegardens; Sidama.
Ano: 2013 URL: http://www.jarts.info/index.php/jarts/article/view/2013030542580
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EFFICIENCY IN AGRICULTURAL PRODUCTION OF BIODIVERSITY: ORGANIC VS. CONVENTIONAL PRACTICES AgEcon
Sipilainen, Timo; Marklund, Per-Olov; Huhtala, Anni.
Promotion of environmental sustainable farming practices is an important policy goal for the whole agricultural sector. However, when the efficiency of production is measured in practice, enhancement of environmental quality such as biodiversity and other environmental amenities does not seem to be recognized as a positive output produced by agriculture. Here, we include crop diversity index as an indicator of environmental output in a comparison of efficiency of conventional and organic crop farms. Non-parametric technical efficiency scores are estimated applying data envelopment analysis on a sample of Finnish crop farms for 1994 – 2002. The results show that in a pooled data set conventional crop farms are more technically efficient than organic farms...
Tipo: Conference Paper or Presentation Palavras-chave: Crop diversity; Shannon index; DDEA; Technical efficiency; Environmental Economics and Policy; Farm Management; Research Methods/ Statistical Methods.
Ano: 2008 URL: http://purl.umn.edu/6478
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Interhousehold variability and its effects on seed circulation networks: a case study from northern Cameroon Ecology and Society
We present a detailed ethnographic case study of sorghum seed acquisitions in a smallholder farming society in northern Cameroon. The effects of variability in household demographics and socioeconomic status on observed patterns of seed provisioning are explored alongside other variables such as age and gender. Our data set comprised 223 seed acquisition events. Independence tests (Pearson’s chi-square and Fisher’s exact tests) were carried out to test for significant dependencies between individual- or household-level characteristics and properties of seed acquisition events (categories of seed source, social relationship of exchange, and type of landrace). Results indicate that wealth is a structuring factor of the local seed...
Tipo: NON-REFEREED Palavras-chave: Crop diversity; Interhousehold variability; Masa; Northern Cameroon; Seed exchange networks; Social network analysis; Sorghum.
Ano: 2016
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Local Seed Systems and Village-Level Determinants of Millet Crop Diversity in Marginal Environments of India AgEcon
Nagarajan, Latha; Smale, Melinda.
In the subsistence-oriented, semi-arid production systems of Andhra Pradesh and Karnataka, India, the environment is marginal for crop growth and often there is no substitute for millet crops. Across communities, farmers grow thirteen different combinations of pearl millet, sorghum, finger millet, little millet, and foxtail millet varieties, but individual farmers grow an average of only two to three millet varieties per season. The notion of the seed system includes all channels through which farmers acquire genetic materials, outside or in interaction with the commercial seed industry. Data are compiled through household surveys and interviews with traders and dealers in village and district markets. Based on the concept of the seed lot, several...
Tipo: Working or Discussion Paper Palavras-chave: Seed systems; Millet diversity; Variety change; Seed users; Crop diversity; Seed industry and trade; Genetic variation; Crop Production/Industries.
Ano: 2005 URL: http://purl.umn.edu/59229
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On Farm Conservation of Rice Biodiversity in Nepal: A Simultaneous Estimation Approach AgEcon
Gauchan, Devendra; Van Dusen, M. Eric; Smale, Melinda.
This paper presents an empirical case study about farmer management of rice genetic resources in two communities of Nepal, drawing on interdisciplinary, participatory research that involved farmers, rice geneticists, and social scientists. The decision-making process of farm households is modelled and estimated in order to provide information for the design of community-based conservation programs. A bivariate model with sample selection treats the simultaneous process of whether farmers decide to plant landraces or modern varieties, and whether the landraces they choose to plant constitute genetic diversity of interest for future crop improvement. Findings show that the two landrace choices are affected by different social and economic factors. The...
Tipo: Working or Discussion Paper Palavras-chave: Genetic resources; Rice; Farmers; Nepal; Landraces; Crop diversity; Crop Production/Industries.
Ano: 2005 URL: http://purl.umn.edu/58589
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