Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 86
Primeira ... 12345 ... Última
Imagem não selecionada

Imprime registro no formato completo
ECONOMIC ANALYSIS OF AGRICULTURAL LAND CONVERSION IN THE SOUTHEAST AgEcon
Nzaku, Kilungu; Bukenya, James O..
Revised version of paper added to AgEcon Search 10/06/05.
Tipo: Conference Paper or Presentation Palavras-chave: Land use; Growth equilibrium modeling; Population; Employment; Land Economics/Use.
Ano: 2005 URL: http://purl.umn.edu/19456
Imagem não selecionada

Imprime registro no formato completo
EQUINE '98, PART I: BASELINE REFERENCE OF 1998 EQUINE HEALTH AND MANAGEMENT AgEcon
Garber, Lindsey.
The NAHMS Equine '98 Study was designed to provide both participants and the industry with information on the nation's equine population for education and research. The USDA's National Agricultural Statistics Service (NASS) collaborated with NAHMS to select a statistically valid sample such that inferences can be made for all places with equids and for all equids in the participating states. Included in the study were 28 states that accounted for 78.2 percent of the U.S. horses and ponies and 78.0 percent of farms with horses and ponies. NASS interviewers collected data from 2,904 participants via questionnaire from March 16 through April 10, 1998 for Part I. Inventory data from the 133 participating race tracks were included in this report....
Tipo: Report Palavras-chave: NAHMS; Equine; Equids; Demographics; Population; Hoof care; Health; EIA; Births; Deaths; Illnesses; Neonatal; Livestock Production/Industries.
Ano: 1998 URL: http://purl.umn.edu/32746
Imagem não selecionada

Imprime registro no formato completo
The Global Supply and Demand for Agricultural Land in 2050: A Perfect Storm in the Making? AgEcon
Hertel, Thomas W..
2010 AAEA Presidential Address; forthcoming in January 2011 AJAE in shortened version.
Tipo: Conference Paper or Presentation Palavras-chave: Global agriculture; Land use; Projections; Population; Yields; Urbanization; Biodiversity; Water; Climate change; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Environmental Economics and Policy; Food Consumption/Nutrition/Food Safety; International Development; International Relations/Trade; Land Economics/Use; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies; Q11; Q15; Q16; Q17.
Ano: 2010 URL: http://purl.umn.edu/92639
Imagem não selecionada

Imprime registro no formato completo
Population and Sustainability: Understanding Population, Environment, and Development Linkages AgEcon
Clay, Daniel C.; Reardon, Thomas.
The triple challenge of rapid population growth, declining agricultural productivity, and natural resource degradation are not isolated from one another; they are intimately related. However, strategic planning and development programming tend to focus on individual sectors such as the environment, agriculture, and population; they do not explicitly take into account the compatibilities and inconsistencies among them. Farm households and their livelihood strategies are at the core of the intersectoral linkages approach advocated in this chapter. Three key aspects of the population-environment-development debate are discussed: first, the finding that inconsistencies between public and individual household behavior regarding childbearing and family planning...
Tipo: Working or Discussion Paper Palavras-chave: Africa; Agriculture; Rwanda; Population; Sustainability; Environment; Food security; Agricultural and Food Policy; Community/Rural/Urban Development; Consumer/Household Economics; Environmental Economics and Policy; Food Security and Poverty; International Development; Q56.
Ano: 1998 URL: http://purl.umn.edu/57055
Imagem não selecionada

Imprime registro no formato completo
Developing effective institutions for water resources management: A case study in the Deduru Oya Basin, Sri Lanka AgEcon
Somaratne, Pallewatte G.; Jinapala, Kiribandage; Perera, L.R.; Ariyaratne, Badugodahewa Ranjith; Bandaragoda, Don Jayatissa; Makin, I.W..
Tipo: Working or Discussion Paper Palavras-chave: River basins; Water resource management; Water lifting; Wells; Domestic water; Population; Economic aspects; Income; Irrigation programs; Institutions; Policy; Groundwater; Agricultural development; Fish farming; Pumps; Ecology; Water supply; Drought; Poverty; Land use; Water scarcity; Natural resources; Agricultural production; Cropping systems; Agricultural and Food Policy; Agricultural Finance; Consumer/Household Economics; Crop Production/Industries; Food Security and Poverty; Institutional and Behavioral Economics; Land Economics/Use; Political Economy; Production Economics; Public Economics; Resource /Energy Economics and Policy.
Ano: 2003 URL: http://purl.umn.edu/92665
Imagem não selecionada

Imprime registro no formato completo
EQUINE '98, PART II: BASELINE REFERENCE OF 1998 EQUINE HEALTH AND MANAGEMENT AgEcon
Garber, Lindsey.
The NAHMS Equine '98 Study was designed to provide both participants and the industry with information on the nation's equine population for education and research. The USDA's National Agricultural Statistics Service (NASS) collaborated with NAHMS to select a statistically valid sample such that inferences can be made for all places with equids and for all equids in the participating states. Included in the study were 28 states that accounted for 78.2 percent of the U.S. horses and ponies and 78.0 percent of farms with horses and ponies. NASS interviewers collected data from 2,904 participants via questionnaire from March 16 through April 10, 1998 for Part II. Contact for this paper: Lindsey Garber
Tipo: Report Palavras-chave: NAHMS; Equine; Equids; Population; Biosecurity; Animal movement; Nutrition; Pasture; Bedding; Manure; Livestock Production/Industries.
Ano: 1998 URL: http://purl.umn.edu/32769
Imagem não selecionada

Imprime registro no formato completo
THE STATE OF NORTH DAKOTA: ECONOMIC OUTLOOK AgEcon
Leistritz, F. Larry.
This paper summarizes the general condition of the North Dakota economy and the outlook for the next few years, addressing recent and projected changes in employment, personal income, and population. Forces affecting the growth and decline of various economic sectors are discussed, and specific examples of new or expanding firms in various economic sectors are presented. Differences in economic performance among regions of the state and between urban and rural areas are examined, and major factors affecting the state's economy over the next two to five years are explored.
Tipo: Working or Discussion Paper Palavras-chave: Economic outlook; North Dakota; Employment; Income; Population; Labor and Human Capital.
Ano: 1999 URL: http://purl.umn.edu/23078
Imagem não selecionada

Imprime registro no formato completo
THE STATE OF NORTH DAKOTA: ECONOMIC, DEMOGRAPHIC, PUBLIC SERVICE, AND FISCAL CONDITIONS AgEcon
Coon, Randal C.; Leistritz, F. Larry.
This report is a compilation of North Dakota data. It is a general reference about socioeconomic conditions and trends in selected economic, demographic, public service, and fiscal variables. Data describing the state's economic base, population, income, employment, retail sales, human and financial resources, local government finance, health and safety, and housing are presented. Data are presented and compared at the county level, the state planning region level, and by metropolitan status. In addition, population, trade area population, taxable sales and purchases, and pull factors are presented at the municipal level. Graphic displays follow the tabular presentations of the data at the county and state planning region level. All of the data...
Tipo: Working or Discussion Paper Palavras-chave: North Dakota; Socioeconomic trends; Economic base; Employment; Population; Migration; Public service availability; Community resources; Fiscal conditions; Financial Economics; Labor and Human Capital.
Ano: 2003 URL: http://purl.umn.edu/23075
Imagem não selecionada

Imprime registro no formato completo
TRENDS IN THE NORTH DAKOTA ECONOMY AgEcon
Coon, Randal C.; Leistritz, F. Larry.
As North Dakota has shifted from its traditional dependence on natural resource-based activities to a more diversified economy, changes in employment, population, income, and retail sales have occurred. This report summarizes changes in these and other economic indicators at the county and community level from 1980 to 2004. Employment increased 12 percent from 1990 to 2004, with 19 of the state's 53 counties registering job growth. The largest percentage (and absolute) gains were in Cass (Fargo) and Burleigh (Bismarck) counties. Population statewide decreased by less than 1 percent from 1990 to 2004, as substantial growth in the Fargo and Bismarck-Mandan metropolitan areas was offset by population decreases in most of the state's rural counties. Per...
Tipo: Working or Discussion Paper Palavras-chave: Employment; Population; Per capita income; Retail sales; Pull factors; Community/Rural/Urban Development.
Ano: 2006 URL: http://purl.umn.edu/23094
Imagem não selecionada

Imprime registro no formato completo
Apprentissage par l’Expérience: L’Utilisation des Résultats des Démonstrations du MINAGRI et du PDMAR pour Améliorer les Programmes de Stimulation de la Demande d’Engrais au Rwanda AgEcon
Kelly, Valerie A.; Nyirimana, Joseph.
Food Security Research Project (FSRP) et Division des Statistiques Agricoles (DSA) Ministère de l’Agriculture, de l’Elevage, et des For MINAGRI
Tipo: Report Palavras-chave: Food security; Food policy; Rwanda; Population; Extension; Crop Production/Industries; Q18.
Ano: 2002 URL: http://purl.umn.edu/55382
Imagem não selecionada

Imprime registro no formato completo
Commercialization of Agriculture Under Population Pressure: Effects on Production, Consumption, and Nutrition in Rwanda AgEcon
von Braun, Joachim; de Haen, Hartwig; Blanken, Juergen.
Rapid population growth in agroecologies that are already under high population pressure poses a major challenge for development policy. It becomes an even greater challenge in complex agroecologies where little new technology for rapid agricultural expansion is available. The mountain zones of the Zaire-Nile Divide in Central Africa present an example of such a challenging environment where agriculture has encroached onto marginal zones, that is, water catchment areas and the last tropical forests of the area. This study by von Braun, de Haen, and Blanken highlights the potentials of agricultural development for the employment, income, and consumption of the poor, but also stresses that nonagricultural rural growth and employment expansion are key to...
Tipo: Report Palavras-chave: Agriculture and State; Rwanda; Produce trade; Government policy; Exports; Food supply; Nutrition policy; Population; Food Consumption/Nutrition/Food Safety; International Development.
Ano: 1991 URL: http://purl.umn.edu/42154
Imagem não selecionada

Imprime registro no formato completo
Rural America at a Glance, 2010 Edition AgEcon
Kusmin, Lorin D.; Hertz, Thomas.
Rural America At A Glance, 2010 Edition highlights the most recent indicators of social and economic conditions in rural areas for use in developing policies and programs to assist rural areas. The 2010 edition focuses on the U.S. rural economy, including employment trends, poverty, and demographics.
Tipo: Report Palavras-chave: Rural indicators; Population; Employment; Rural unemployment; Nonmetropolitan; Nonmetro; Rural economy; Metro; Rural America; Census data; Population growth; Unemployment; Poverty; Demographics; ERS; USDA; Community/Rural/Urban Development.
Ano: 2010 URL: http://purl.umn.edu/96637
Imagem não selecionada

Imprime registro no formato completo
Impacts of Population and Income Growth Rates on Threatened Mammals and Birds AgEcon
Pandit, Ram; Laband, David N..
Per capita income and human population levels in a country have direct influences on its environmental outcomes. Countries with same level of income may have different rate of income growth and vice versa, suggesting that the influence of the rate of income growth on environmental outcomes could be different than that of income level. Similarly, the rate of population growth might have different impact in addition to the impacts of sheer number of population. We explore this empirical question using country-level data on threatened species published by IUCN for the year 2007. Controlling for other factors, our model estimates the influences of the rate of population and income growth on threatened mammals and birds across 113 continental countries. The...
Tipo: Conference Paper or Presentation Palavras-chave: Income; Population; Spatial models; Spatial autocorrelation; Endemic species; Biodiversity; Environmental Economics and Policy; C21; Q57.
Ano: 2011 URL: http://purl.umn.edu/101404
Imagem não selecionada

Imprime registro no formato completo
The role of poultry industry in indian economy Rev. Bras. Ciênc. Avic.
Vetrivel,SC; Chandrakumarmangalam,S.
Poultry farming in India, in spite of several constraints, has progressed considerably during the last decade. The present study has been undertaken to examine various aspects related to the growth and development of poultry production in the country. Poultry production in India was confined to backyards till recently. Local breed of birds were reared for the supply of eggs and meat. The increasing demand for poultry products necessitates augmenting the supply by importing improved breeds of poultry. In 1961, the proportion of hybrid populations in the total population of poultry was about 2 percent. Within a couple of decades, these birds have dominated the market sidelining the indigenous birds. The technological advances have revolutionized the role and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Eggs; Supply; Production; Technology; Growth; Population.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000400001
Imagem não selecionada

Imprime registro no formato completo
Geographical variation in the reproduction and sexual dimorphism of the Boddaert's tropical racer, Mastigodryas boddaerti (Serpentes: Colubridae) Rev. Bras. Zool.
Siqueira,Débora M.; Nascimento,Loana P.; Montingelli,Giovanna G.; Santos-Costa,Maria Cristina dos.
We obtained data on time of sexual maturity, dimorphism, fecundity and on the reproductive cycle of Mastigodryas boddaerti (Sentzen, 1796) through the examination of 321 preserved specimens, of which 221 were collected in the Brazilian Amazon region and 100 in the Cerrado savannas of Central Brazil. The degree of sexual size dimorphism (snout-vent length, SVL) was significantly greater in the specimens from the Cerrado in comparison with those from the Amazon. Females had a significantly larger number of ventral scales, on average, whereas males had more sub-caudal scales. However, there was no intersexual difference in tail length or head width, although the heads of the males were significantly longer, which may reflect dietary differences. Breeding...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazonia; Ecology; Cerrado; Morphology; Population.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000500002
Imagem não selecionada

Imprime registro no formato completo
Intraspecific differences in metabolic rate of Chroeomys olivaceus (Rodentia: Muridae): the effect of thermal acclimation in arid and mesic habitats RChHN
Novoa,F. Fernando; Rivera-hutinel,Antonio; rosenmann,Mario; Sabat,Pablo.
Studies of metabolic capacities in rodents have been largely studied at an inter-specific levels, but physiological capacities of populations belonging to the same species have received lesser attention. Here we studied the maximum and basal metabolic rates of two populations of the rodent Chroeomys olivaceus dwelling in habitats with contrasting temperature and rainfall regimes, and to test if differences in metabolic capacities are due to local adaptation or acclimatization effect. After four weeks of acclimation to 25 ºC and 10 ºC, the BMR and MMR were determined in individuals from the northern population of Caleta Loa, and the southern population of La Picada. Individuals from ‘La Picada’ population were heavier than those from Caleta Loa. MMR and BMR...
Tipo: Journal article Palavras-chave: Basal metabolic rate; Chroeomys olivaceus; Maximum metabolic rate; Population; Phenotypic plasticity.
Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000200004
Imagem não selecionada

Imprime registro no formato completo
Population density and reproduction of two Peruvian leaf-eared mice (Phyllotis spp.) RChHN
ARANA,MARGARITA; RAMÍREZ,OSWALDO; SANTA MARÍA,SERGIO; KUNIMOTO,CESAR; VELARDE,RODRIGO; DE LA CRUZ,CECILIA; RUÍZ,MARíA LUISA.
Population density and reproduction were studied in two leaf-eared mice (Phyllotis spp.) in the Peruvian locality known as Lomas de Lachay. Density varied between 0-3 individuals ha-1 in P. andium, and between 0-12 individuals ha-1 in P. amicus. An annual cycle of population abundance was observed in both species. Phyllotis amicus showed no seasonal reproductive activity, but P. andium had seasonal reproduction with pregnant females principally observed between July and September. Differences in juvenile weight were related to litter size. It is likely that two young was the optimal litter size in the harsh and seasonal xeric environment of Lomas de Lachay. Our results suggest that P. amicus maintains low, highly dispersed populations in a harsh...
Tipo: Journal article Palavras-chave: Ecology; Phyllotis; Rodents; Population; Desert.
Ano: 2002 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000400010
Imagem não selecionada

Imprime registro no formato completo
Optimal plant density and nitrogen rates for improving off-season corn yields in Brazil Scientia Agricola
Faria,Italo Kaye Pinho de; Vieira,José Luís Vilela; Tenelli,Sarah; Almeida,Rodrigo Estevam Munhoz de; Campos,Leonardo José Motta; Costa,Rodrigo Veras da; Zavaschi,Eduardo; Almeida,Risely Ferraz de; Carneiro,Leandro de Mello e Silva; Otto,Rafael.
ABSTRACT: Integrating plant density and nitrogen (N) management is a strategy for improving corn yields, especially for off-season corn production in the tropics. This study tested the hypothesis that increasing plant densities and N rates promotes yield gains for off-season corn production in high-yielding environments. The aim of the study was to investigate the yield performances of two hybrid versions (DKB PRO and DKB PRO3) submitted to three plant densities (55,000; 65,000 and 75,000 plants ha−1) and four N rates (control, 60, 120 and 180 kg ha−1 N). Field trials were undertaken at Uberlândia-MG (site1 and 2) and Pedro Afonso-TO (site 3), Brazil from which data on corn yield parameters were collected and analyzed. Multivariate analysis separated the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Hybrid; Population; Corn yield; Second-crop.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001400344
Imagem não selecionada

Imprime registro no formato completo
Phenotypic, additive genetic and environment correlations of maize landraces populations in family farm systems Scientia Agricola
Barros,Luciane Bertoletti; Moreira,Rosângela Maria Pinto; Ferreira,Josué Maldonado.
Knowledge of the association between characters is very important in the genetic breeding programs, but there is limited information about correlations between traits in maize landraces in the current literature. The objectives of this study were to estimate phenotypic, additive genetic and environment correlations among traits in maize landraces, which were cultivated in family farm systems, in order to guide the participatory breeding on maize landraces. Between 294 and 400 half-sib progenies from the six populations were evaluated, subdivided in triple 7X7 and 10X10 lattice design, respectively, with single row plots of 4 m long and spaced 1.00 × 0.20 m. Estimates of correlation coefficients are reported for nine traits: grain yield (GY), relation grain...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays L.; Population; Recurrent selection; Participatory breeding.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000600010
Imagem não selecionada

Imprime registro no formato completo
Spatial distribution of plant-parasitic nematodes in sugarcane fields Scientia Agricola
Dinardo-Miranda,Leila Luci; Fracasso,Juliano Vilela.
Nematodes are important parasites of sugarcane in Brazil. Because of this, several studies have been conducted in recent years to evaluate the effectiveness of control methods. However, no studies have been reported on the spatial distribution of nematodes in sugarcane fields, and such studies are indispensable for the development of sampling plans, aimed at their application in integrated management programs. The spatial distribution of Meloidogyne javanica, Pratylenchus zeae, and mixed populations of P. zeae and P. brachyurus was studied in six commercial fields, with areas ranging from 0.26 to 0.50 ha; samples were obtained during the rainy season. The samples, represented by about 50 g roots, were collected within a rectangular grid measuring 7 × 12 m,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Saccharum; Meloidogyne; Pratylenchus; Spatial variability; Population.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000200007
Registros recuperados: 86
Primeira ... 12345 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional