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A SECTORAL ANALYSIS OF AGRICULTURAL TRADE LIBERALIZATION AgEcon
Kennedy, P. Lynn; Atici, Cemal.
Complete agricultural trade liberalization between the United States and the European Union is examined with respect to the agricultural sector. A static, partial equilibrium model, distinguishing among the European Union, the United States, and a politically passive rest of the world, is used to simulate agricultural free trade. The results of this research reveal how European Union and United States adoption of free trade affects domestic and world prices, production, consumption, self-sufficiency, and welfare.
Tipo: Journal Article Palavras-chave: Agricultural policy; European Union; Trade liberalization; United States; International Relations/Trade.
Ano: 1998 URL: http://purl.umn.edu/15559
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A simple indicator for diagnosing nitrate leaching risk below the root zone using the Tensionic tensiometers Inra
Cuny, H.; Wery, J.; Gaufres, F..
Le potentiel hydrique et la teneur en nitrate de la solution du sol ont été mesurés en parcelles agricoles, à l’aide de tensiomètres Tensionic, pour calculer un indicateur de risque de lessivage du nitrate. Trois sites comprenant deux tensiomètres Tensionic situés sous la zone racinaire ont été suivis tous les 10 jours sous trois systèmes de culture (prairie, grandes cultures, vigne enherbée) en 1994 et 1995, et au cours de l’hiver 1996-97 sous des cultures de salade de plein champ et sous abri. L’indicateur de risque est défini par la teneur en nitrate de la solution du sol pendant les périodes de drainage, identifiées à l’aide du gradient de potentiel hydrique. Cette approche permet de porter un diagnostic sur des parcelles agricoles différant par...
Tipo: Journal Article Palavras-chave: SOL AGRICOLE; SOLUTION DU SOL; POTENTIEL HYDRIQUE DU SOL; MESURE.
Ano: 1998 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9900002180073332&uri=/notices/prodinra1/2010/01/
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A simple way of avoiding feed wastage in European seabass, Dicentrarchus labrax, under self-feeding conditions ArchiMer
Coves, Denis; Gasset, Eric; Lemarie, Gilles; Dutto, Gilbert.
Self-feeding systems allow fish to freely express feeding activity. A simple rod at the water surface can act as a trigger and provide fish with a way of obtaining pellets from a feeder. Such a rod presented to experienced European seabass, Dicentrarchus labrax, may lead to feed wastage, probably as a result of unintentional fish contacts with the trigger. Trigger protection screens have been designed to prevent fish contacting the trigger by chance, and the efficacy of such screens was tested. Nocturnal and diurnal feed delivery and feed wasted were compared under conditions where the rod was unprotected or protected by semi-cylindrical or cylindrical screens. Tests were conducted using an unrestricted self-feeding regime (reward: 0.2 g pellet per kg of...
Tipo: Text Palavras-chave: Feeding behaviour; Feed wastage; Self feeding; Fish culture; Comportement alimentaire; Gaspillage d'aliment; Auto alimentation; Élevage de poissons.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/1998/publication-867.pdf
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A simulation bio-economic model applications for fishery management introducing uncertainty IRD
Chaboud, Christian.
Simulation bio-economic models are powerful tools to understand the impact of exogenous factors, natural or economic, on fisheries dynamics and to help decision making in fisheries management. We have developed a model with three components (resource, fleet and management) which is especially oriented to analyse the impact of different management policies, in deterministic or stochastic decisions. This model is particularly adapted to explore bias situations (economic or biological). A friendly PC software has been developed and will be presented. Simulations can be easily run for fishery dynamics analysis and management policy evaluation, in relation with different sets of hypothesis. (Résumé d'auteur)
Tipo: Text Palavras-chave: PECHE; GESTION DES PECHES; MODELISATION; AIDE A LA DECISION; MODELE BIOECONOMIQUE; GESTION DU RISQUE.
Ano: 1998 URL: http://www.documentation.ird.fr/hor/fdi:010017904
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A single-step purification of bothropstoxin-1 BJMBR
Spencer,P.J.; Aird,S.D.; Boni-Mitake,M.; Nascimento,N.; Rogero,J.R..
Bothrops venoms are complex mixtures of components with a wide range of biological activities. Among these substances, myotoxins have been investigated by several groups. Bothropstoxin-1 (Bthtx-1) is a phospholipase A2-like basic myotoxin from Bothrops jararacussu. The purification of this component involves two chromatographic steps. Although providing a pure material, the association of these two steps is time consuming and a single-step method using high performance chromatography media would be useful. In the present study, we describe a single-step purification method for Bthtx-1. Bothrops jararacussu venom was dissolved in 1 ml buffer. After centrifugation, the supernatant was injected into a Resource-S cation exchange column connected to an FPLC...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Myotoxins; Purification; Chromatography; Bothrops jararacussu; Bothropstoxin-1.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000900004
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A situação atual da sorose dos citros no mundo. Infoteca-e
NICKEL, O..
O grupo de doenças da sorose dos citros causa descascamento de troncos, galhos e ramos de laranjeiras doces, pomeleiros e tangerineiras, além de sintomas foliares e em frutos. Nesta revisão se discute a relação da sorose dos citros com doenças similares, características e ocorrência de isolados em varias regiões, transmissibilidade, disseminação, indexação, limpeza de material propagativo e controle. Distingue-se a sorose A (longa incubação) e a sorose B (virulenta, incubação curta). Alguns isolados induzem depressões em forma de sulcos e anéis em frutos e manchas anelares em folhas. Sob temperaturas amenas e comum observar-se um bandeamento clorótico entre as nervuras secundárias de folhas jovens, que se pode considerar o sintoma precoce da sorose A. No...
Tipo: Documentos (INFOTECA-E) Palavras-chave: Citrus spp; Doença de planta.
Ano: 1998 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/638439
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A situação atual de cisternas rurais construidas por programas governamentais. Repositório Alice
LIBERAL, G. da S.; PORTO, E.R..
1999
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Cisterna; Orçamento; Custo; Construção; Avaliação; Tanks; Cost; Construction; Valuation; Recurso natural; Natural resource.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/handle/doc/132329
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A socio-economic appraisal of Jaíba irrigation scheme in Southeastern Brasil. Repositório Alice
RODRIGUES, L.; BRITO, R.A.; ANDRADE, C. L. T..
1998
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Socio-economia; Irrigacao; Jaiba; Minas Gerais; Brasil; Brazil; Socio-economic; Irrigation.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/handle/doc/482977
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A state of the art on meiofaunal respiration and production OMA
Moens, T.; Vincx, M..
The aerobic respiration of meiofauna in general and of nematodes in particular is studied by means of manometric (Cartesian or related divers) or electrode-based (polarographic electrodes) techniques. The former allow highly accurate measurements on individual or small batches of nematodes, while the latter, less sensitive technique allows rapid and highly reproducible measurements under a variety of abiotic conditions.Nematode respiration is commonly described in a power relation R = aW<sup>b</sup>, where b averages 0.75 and a represents a measure of metabolic intensity. Published estimates of total nematode community respiration are scant, but seem to agree on an average value of 61...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biological production; Meiobenthos; Respiration.
Ano: 1998 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7318
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A STATISTICAL ANALYSIS OF THE NORTH DAKOTA LIGNITE ENERGY INDUSTRY'S CONTRIBUTION TO THE STATE ECONOMY FOR 1997 AND PROJECTED FOR 1998 AgEcon
Leistritz, F. Larry; Coon, Randal C..
This report provides estimates of the lignite industry's contribution to the North Dakota economy, using key economic indicators such as retail trade activity, personal income, total business activity, employment, and tax revenues. The estimates are based on actual industry expenditures for 1997 and projected expenditures for 1998. This analysis contains two measures of the relative importance of the lignite energy industry in North Dakota. First, the industry's share of the state's total sales to final demand (or exports) is evaluated. Second, the business volume generated by the industry is compared to the total gross business volume for the state. Expenditures were obtained from a survey of firms involved in lignite-related activities (mining or...
Tipo: Working or Discussion Paper Palavras-chave: Economic impacts; Lignite (coal) mining; Lignite conversion; Input-output analysis; Resource /Energy Economics and Policy.
Ano: 1998 URL: http://purl.umn.edu/23087
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A STOCHASTIC DOMINANCE ANALYSIS OF ALTERNATIVE SUGAR BEET- AND NAVY BEAN- BASED CROP ROTATIONS IN MICHIGAN AgEcon
Gebremedhin, Berhanu; Schwab, Gerald; Harwood, Richard R.; Christenson, Donald; Bricker, Calvin.
Sugar beets (Beta vulgaris L.) and navy beans (Phaseoulus vulgaris L.) have been important target crops in the crop rotation systems of many Michigan growers, particularly in the Saginaw Valley and the Thumb region. The recent decline in sugar beet yields combined with the erratic navy bean yields have led to concern about the optimal crop rotation for the East Central region in Michigan. Risk is an important consideration in a farmer's choice of cropping systems. This study uses 20 years of experimental data from the Michigan State University Saginaw Valley Research Farm to determine the risk efficiency of alternative sugar beet- and navy bean- based crop rotations that included corn (Zea mays L.), oats (Avena sativa L.), and alfalfa (Medicago sativa...
Tipo: Working or Discussion Paper Palavras-chave: Crop rotation; Cropping system; Risk; Stochastic dominance analysis; First-degree stochastic dominance; Second-degree stochastic dominance.; Crop Production/Industries.
Ano: 1998 URL: http://purl.umn.edu/11509
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A strong test of the von Liebig hypothesis AgEcon
Berck, Peter; Geoghegan, Jacqueline; Stohs, Stephen M..
Tipo: Working or Discussion Paper Palavras-chave: Corn; Production function; Von liebig; Wheat; Production Economics.
Ano: 1998 URL: http://purl.umn.edu/43911
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A STRUCTURAL-EQUATION GME ESTIMATOR AgEcon
Marsh, Thomas L.; Mittelhammer, Ronald C.; Cardell, N. Scott.
A generalized maximum entropy estimator is developed for the linear simultaneous equations systems model. We provide results on large and small sample properties of the estimator. Empirical results illustrate efficiency advantages of the generalized maximum entropy estimator proposed in this study over traditional estimators (e.g., 2SLS and 3SLS).
Tipo: Conference Paper or Presentation Palavras-chave: Research Methods/ Statistical Methods.
Ano: 1998 URL: http://purl.umn.edu/20890
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A STUDY OF CONSUMERS AT A SMALL FARMERS' MARKET IN MAINE: RESULTS FROM A 1995 SURVEY AgEcon
Kezis, Alan S.; Gwebu, Thula; Peavey, Stephanie R.; Cheng, Hsiang-Tai.
This study was based on a survey of customers who shopped at a small farmers' market during the summer/fall market season of 1995. Information from a survey completed by 239 shoppers was used to develop a profile of the primary consumer group, defined as those who shop regularly at the market and spend the most per visit. Comparisons between survey data and census data for the local population showed that primary shoppers at the market had higher education, higher annual household income, tended to be slightly older, and were more likely to be employed women. For the most part, the respondents were loyal, weekly shoppers who patronized the market because of the high quality of the products. Most reported that they were willing to pay more for produce...
Tipo: Journal Article Palavras-chave: Consumer/Household Economics.
Ano: 1998 URL: http://purl.umn.edu/27442
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A study of the diversity of whitefly-trnasmitted geminivirus in the Submedio of San Francisco Valley- Brazil using PCR. Repositório Alice
SILVEIRA, F. Q. de P.; ROCHA, H. G. C.; LIMA, M. F.; RESENDE, L. V.; AVILA, A. C. de; BEZERRA, I. C..
bitstream/item/182378/1/Fitopatologia-Brasileira-v.23-p.312-1998.pdf
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Geminiviruws; Diversidade; Variabilidade genetica; Submedio Sao Francisco; White flies; Diversity; Genetic variability; Mosca Branca; Inseto Para Controle Biológico; Praga de Planta.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/133384
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A study on vegetative propagation of pyrethrum (Chrysanthemum cinerariaeforium) by tissue culture method Thai Agricultural
Mongkolsook, Y.; Phansidri, S..
Palavras-chave: Vegetative; Propagation; Tissue; Culture; Method.
Ano: 1998 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5001
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A SYSTEM-WIDE APPROACH FOR ANALYZING JAPANESE WHEAT IMPORT ALLOCATION DECISIONS AgEcon
Schmitz, Troy G.; Wahl, Thomas I..
This paper develops and implements an import allocation model based on Theil's system-wide approach to demand and tests the assumption of blockwise dependence and uniform substitutability among different sources and types of wheat imported by Japan.
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries; International Relations/Trade; Research Methods/ Statistical Methods.
Ano: 1998 URL: http://purl.umn.edu/20780
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A taxonomic revision of Plagiogyriaceae (Pteridophyta) Naturalis
Zhang, Xian-Chun; Nooteboom, H.P..
A taxonomic revision of Plagiogyriaceae is presented. One genus and 11 species are recognised. One species, P. egenolfioides, is subdivided into four varieties. Only one species, P. pectinata, occurs in the New World, all others in the Old World. One species, P. glauca, and one variety, P. egenolfioides var. decrescens, extend east to the S Pacific islands (Solomons).
Tipo: Article / Letter to the editor
Ano: 1998 URL: http://www.repository.naturalis.nl/record/524634
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A taxonomic revision of the genera Cycas and Epicycas gen. nov. (Cycadaceae) Naturalis
Laubenfels, D.J. de; Adema, F..
The genus Cycas L is divided into four subgenera, all new, and thirty species are described, of which two are new. A new Asian genus, Epicycas de Laub., is recognized for several Cycas species and one undescribed species with a subterranean bulbous stem base. Keys to the subgenera of Cycas and their species, and to the genus Epicycas are given.
Tipo: Article / Letter to the editor Palavras-chave: Cycas; Epicycas; Morphology; Taxonomy.
Ano: 1998 URL: http://www.repository.naturalis.nl/record/525403
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A terra e a mudança: reprodução social e património fundiário na Terra Fria Transmontana IPB - Escola Superior Agrária
Rodrigues, Orlando.
O problema central que preside à elaboração deste trabalho é a evolução das estruturas da propriedade fundiária face às recentes mudanças globais. A análise centra-se sobre o espaço geográfico constituído pela Terra Fria Transmontana (concelhos de Bragança e Vinhais), região marginal, seja pela sua estrutura sócio-económica (forte peso do sector primário na actividade económica, estrutura demográfica envelhecida e forte dependência de rendimentos externos), seja pelas condições desfavoráveis à prática de uma agricultura intensiva. Ao longo desta evolução, a estrutura da propriedade fundiária manifestou uma grande estabilidade, apesar das limitações naturais da região para a produção agrícola e dos elevados custos de produção. Optando por uma óptica de...
Tipo: Book Palavras-chave: Política agrícola; Práticas fundiárias; Propriedade fundiária; Sucessão herança.
Ano: 1998 URL: http://hdl.handle.net/10198/4189
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