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| Registros recuperados: 479 | |
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| Kikuchi, Masao; Weligamage, Parakrama; Barker, Randolph; Samad, Madar; Kono, Hiroichi; Somaratne, H.M.. |
| The use of shallow wells, equipped with small pumps, to lift groundwater has spread rapidly in many agricultural regions of tropical monsoonal Asia. In Sri Lanka, the rapid and pervasive invasion of agro-wells and pumps drew the attention of policymakers and researchers, but many questions were left unanswered due to lack of research in the area. This study aims to fill this gap in knowledge, based on observations and data obtained in field surveys conducted in major and minor irrigation schemes in the dry zone of Sri Lanka. This report gives the key findings of this study into the pattern, extent and causes of the spread and use of agro-wells and pumps in traditional villages and irrigated settlement schemes. It investigates farmer investments in... |
| Tipo: Report |
Palavras-chave: Wells; Construction technology; Pumps; Arid zones; Investment; Irrigation systems; Irrigation programs; Rice; Estimation; Agribusiness; Agricultural Finance; Crop Production/Industries; Financial Economics; Marketing; Public Economics. |
| Ano: 2003 |
URL: http://purl.umn.edu/44558 |
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| ZOHAIB,A.; ANJUM,S.A.; JABBAR,A.; TABASSUM,T.; ABBAS,T.; NAZIR,U.. |
| ABSTRACT The present study was aimed at determining the allelopathic influence of water extracts at varying concentrations (2.5% and 5% w/v) and residues with varying decomposition periods (0, 15 and 30 days) at 2% (w/w) concentration of four weeds (Trigonella polycerata, Vicia sativa, Lathyrus aphaca, Medicago polymorpha) against rate, synchronization and time of germination, and biomass partitioning of rice through plant and soil bioassays. Germination and biomass partitioning in rice plants were inhibited by extracts and residues. The maximum decrease in energy of germination (88.6%) and increase in time for 50% germination (210.4%) were caused by the L. aphaca extract at 5% concentration as compared to control. Root and shoot, fresh weight (13.6 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allelopathy; Leguminous weeds; Rice; Germination; Biomass partitioning. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100269 |
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| Hignight, Jeffrey A.; Watkins, K. Bradley; Anders, Merle M.. |
| No-till (NT) has been shown to reduce fuel, labor, and machinery costs compared to conventional-till (CT) but very few rice producers in Arkansas practice NT. The low adoption rate is most likely due to difficulties in management but also limited information on the profitability and risk of NT. Most rice producers are knowledgeable on NT costs savings but consider it less profitable due to yield reductions offsetting costs savings. This study evaluates production costs, crop yields, and economic risk of both NT and CT in five rice-based cropping systems (continuous rice, rice-soybean, rice-corn, rice-wheat, and rice-wheat-soybean-wheat). Yields, crop prices, and key input prices are simulated to create net return distributions. Stochastic efficiency... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Cropping systems; Rice; No-till; Certainty equivalent; Risk premium; Crop Production/Industries; Farm Management; Financial Economics; Land Economics/Use; Production Economics; Risk and Uncertainty. |
| Ano: 2010 |
URL: http://purl.umn.edu/56354 |
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| Abdulai, Awudu; Huffman, Wallace E.. |
| This paper employs a stochastic frontier model to examine profit inefficiency of rice farmers in the Northern Region of Ghana using farm-level survey data. The efficiency index, based on a half-normal distribution of the stochastic error term is related to farm and household characteristics. The empirical results show that farmers' human capital represented by the level of schooling contributes positively to production efficiency, suggesting that investment in farmers' education improves their allocative performance. Access to credit and greater specialization in rice production, are found to be positively related to production efficiency. A farmer's participation in nonfarm employment and being older, however, reduce production efficiency. Farmers... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Africa; Ghana; Production efficiency; Profit frontier; Rice; Crop Production/Industries. |
| Ano: 1998 |
URL: http://purl.umn.edu/18271 |
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| Ireta Paredes, Arely del Rocío. |
| El cultivo del arroz en México ha venido disminuyendo desde 1994 a causa de las importaciones que con la firma del Tratado Trilateral de Libre Comercio se han incrementado por parte de los molineros. A consecuencia de esto, la cadena productiva del arroz en los eslabones de productor y beneficiador se está desarticulando. La presente investigación pretende explicar la competitividad de la cadena del arroz haciendo uso del enfoque “CADIAC”, el cual se basa en metodología de cadenas tomando en cuenta el factor humano, esto es, hace uso del Diálogo entre los actores que integran los eslabones de la cadena (desde la producción del arroz palay hasta la comercialización del arroz pulido); y del consenso entre los actores para definir qué Acciones impulsar para... |
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Palavras-chave: Arroz; CADIAC; Competitividad; Matriz de análisis de políticas; Rice; Competitiveness; Matrix of analysis of policies; Maestría; Economía. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/97 |
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| Ireta Paredes, Arely del Rocío. |
| El cultivo del arroz en México ha venido disminuyendo desde 1994 a causa de las importaciones que con la firma del Tratado Trilateral de Libre Comercio se han incrementado por parte de los molineros. A consecuencia de esto, la cadena productiva del arroz en los eslabones de productor y beneficiador se está desarticulando. La presente investigación pretende explicar la competitividad de la cadena del arroz haciendo uso del enfoque “CADIAC”, el cual se basa en metodología de cadenas tomando en cuenta el factor humano, esto es, hace uso del Diálogo entre los actores que integran los eslabones de la cadena (desde la producción del arroz palay hasta la comercialización del arroz pulido); y del consenso entre los actores para definir qué Acciones impulsar para... |
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Palavras-chave: Arroz; CADIAC; Competitividad; Matriz de análisis de políticas; Rice; Competitiveness; Matrix of analysis of policies; Maestría; Economía. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/97 |
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| Tur Cardona, Juan; Wailes, Eric J.; Dixon, Bruce L.; Danforth, Diana M.. |
| Multifunctional agriculture is particularly fundamental to some working lands conservation policies and programs, such as the Environmental Quality Incentive Program (EQIP), Conservation Security Program (CSP) and Wildlife Habitat Incentive Program (WHIP). Farmers can also be engaged in providing recreational and agri-tourism services such as hunting, fishing, bird-watching, farm tours, petting zoos and hospitality services. Using the Agricultural Resource Management Survey (ARMS) we analyze factors associated with participation in conservation, recreation and agri-tourism activities as a function of farm structure, farm financial measures, production practices, and socio-demographic characteristics of the farm operator. To estimate the functional... |
| Tipo: Presentation |
Palavras-chave: Multifunctional agriculture; Agri-environmental policy; Rice; Logistic model; Agricultural and Food Policy; Community/Rural/Urban Development; Crop Production/Industries; Environmental Economics and Policy; Land Economics/Use; Q18; Q26; Q28. |
| Ano: 2012 |
URL: http://purl.umn.edu/119750 |
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| Tur Cardona, Juan; Wailes, Eric J.; Dixon, Bruce L.; Danforth, Diana M.. |
| Multifunctional agriculture is particularly fundamental to some working lands conservation policies and programs, such as the Environmental Quality Incentive Program (EQIP), Conservation Security Program (CSP) and Wildlife Habitat Incentive Program (WHIP). Farmers can also be engaged in providing recreational and agri-tourism services such as hunting, fishing, bird-watching, farm tours, petting zoos and hospitality services. Using the Agricultural Resource Management Survey (ARMS) we analyze factors associated with participation in conservation, recreation and agri-tourism activities as a function of farm structure, farm financial measures, production practices, and socio-demographic characteristics of the farm operator. To estimate the functional... |
| Tipo: Presentation |
Palavras-chave: Multifunctional agriculture; Agri-environmental policy; Rice; Logistic model; Agricultural and Food Policy; Land Economics/Use; Q18; Q26; Q28. |
| Ano: 2012 |
URL: http://purl.umn.edu/119768 |
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| Araújo,Adelson Paulo. |
| Plant growth analysis presents difficulties related to statistical comparison of growth rates, and the analysis of variance of primary data could guide the interpretation of results. The objective of this work was to evaluate the analysis of variance of data from distinct harvests of an experiment, focusing especially on the homogeneity of variances and the choice of an adequate ANOVA model. Data from five experiments covering different crops and growth conditions were used. From the total number of variables, 19% were originally homoscedastic, 60% became homoscedastic after logarithmic transformation, and 21% remained heteroscedastic after transformation. Data transformation did not affect the F test in one experiment, whereas in the other experiments... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: ANOVA model; Statistic; Phosphorus; Common bean; Rice. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000100001 |
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| Registros recuperados: 479 | |
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