|
|
|
| Registros recuperados: 14 | |
|
|
| Hailu, Yohannes G.; Brown, Cheryl. |
| Using county data for West Virginia, Maryland, and Pennsylvania, estimation of a system of simultaneous equations shows that population growth, higher taxes, high farmland value, and high initial per capita income accelerate farmland development, but return on farmland, government assistance to farmers, farmland conservation, and farming agglomeration reduce development pressure. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Farmland; Development; Regional growth; Policy; Equilibrium model; Spatial autocorrelation; Land Economics/Use. |
| Ano: 2005 |
URL: http://purl.umn.edu/19488 |
| |
|
|
| Diniz-Filho,José Alexandre Felizola; Oliveira,Guilherme de; Lobo,Fábio; Ferreira,Laerte Guimarães; Bini,Luis Mauricio; Rangel,Thiago Fernando Lopes Valle Brito. |
| The Cerrado biome, the second largest biome in Neotropical region, consists of a mosaic of different habitat types, ranging from open grasslands to dense woodlands and dry forests. An intensive recent occupation process has transformed it into the most important region for cattle ranching and intensive commodity crops in Brazil. In this study, a macroecological approach was used to evaluate broad-scale spatial patterns of habitat loss in the Brazilian Cerrado, applying a series of spatial autocorrelation and partial regression analyses to understand how the proportion of remaining natural habitats is correlated with socio-economic variables, expressing different dimensions of human occupation and climatic variation. On average, 59% of the area is occupied... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MODIS; Brazilian Cerrado; Spatial autocorrelation. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000600007 |
| |
|
| |
|
|
| TELLES,MARIANA P. DE C.; DINIZ-FILHO,JOSÉ ALEXANDRE F.; COELHO,ALEXANDRE S.G.; CHAVES,LÁZARO J.. |
| Dentre as diversas árvores frutíferas nativas dos cerrados, a cagaiteira (Eugenia dysenterica DC.) merece destaque pelo seu amplo potencial econômico. A fim de fornecer algumas informações relativas ao padrão espacial da variabilidade genética desta espécie, foram realizadas análises de autocorrelação espacial das freqüências alélicas em dez subpopulações locais da região sudeste do Estado de Goiás. Foram utilizados marcadores isoenzimáticos, em um total de seis sistemas enzimáticos (SKDH, 6-PGD, alfa-EST, MDH, PGI e PGM), com oito locos polimórficos. Foi realizada uma análise de autocorrelação espacial, utilizando índices I de Moran estimados em quatro classes de distância geográfica. Os correlogramas mostraram que, de fato, a divergência genética está... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eugenia dysenterica; Isozymes; Neutral evolution; Spatial autocorrelation. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000200003 |
| |
|
| |
|
|
| Du, Xiaodong; Hennessy, David A.; Edwards, William M.. |
| Based on the Ricardian rent theory, this study employs the variable profit function to analyze the determinants of Iowa cropland cash rental rates using county-level panel data from 1987 to 2005. Accounting for spatial and temporal autocorrelations, responses of local cash rental rates to changes in output prices and other exogenous variables are estimated. We find that Iowa cash rental rates are largely determined by output/input prices, soil quality, relative location, and other county-specific factors. Cash rents go up by $79 for a $1 increase in corn price in the short run. The marginal value of cropland quality, as represented by row-crop corn suitability rating index, is about $1.05. Ethanol plants are not found to have a significant local effect on... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Bargaining; Basis; Ethanol; Land quality shadow price; Rate of adjustment; Spatial autocorrelation; Land Economics/Use. |
| Ano: 2007 |
URL: http://purl.umn.edu/7700 |
| |
|
| |
|
| |
|
| |
|
|
| Seffrin, Rodolfo; Araújo, Everton Coimbra De; Bazzi, Claudio Leones. |
| This study aimed to identify areas that showed spatial autocorrelation for corn yield and its predictive variables (i.e., average air temperature, rainfall, solar radiation, soil agricultural potential and altitude) and to determine the most appropriate spatial regression model to explain this culture. The study was conducted using data from the municipalities of the state of Paraná relating to the summer harvests in 2011/2012, 2012/2013, and 2013/2014. The statistical diagnostic of the OLS (Ordinary Least Square regression model) was employed to determine the most suitable regression model to predict corn yield. The SAR (Spatial Lag Model) was recommended for all crop years; however, the Spatial Error Model (CAR) was recommended only for the 2013/2014... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Autoregressive spatial model; Moran’s index; Spatial autocorrelation; Spatial error model; Spatial regression.; Produção de Cultura; Geomática. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/36494 |
| |
|
|
| Seffrin, Rodolfo; Araújo, Everton Coimbra De; Bazzi, Claudio Leones. |
| This study aimed to identify areas that showed spatial autocorrelation for corn yield and its predictive variables (i.e., average air temperature, rainfall, solar radiation, soil agricultural potential and altitude) and to determine the most appropriate spatial regression model to explain this culture. The study was conducted using data from the municipalities of the state of Paraná relating to the summer harvests in 2011/2012, 2012/2013, and 2013/2014. The statistical diagnostic of the OLS (Ordinary Least Square regression model) was employed to determine the most suitable regression model to predict corn yield. The SAR (Spatial Lag Model) was recommended for all crop years; however, the Spatial Error Model (CAR) was recommended only for the 2013/2014... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Produção de Cultura; Geomática autoregressive spatial model; Moran’s index; Spatial autocorrelation; Spatial error model; Spatial regression. Produção de Cultura; Geomática. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/36494 |
| |
|
| |
|
| |
|
|
| Scherpinski, Clementina; UNIOESTE; Uribe Opazo, Miguel Angel; UNIOESTE; Vilas Boas, Marcio Antonio; UNIOESTE; Sampaio, Silvio César; UNIOESTE; Johann, Jerry Adriani; UNIOESTE. |
| Quando as áreas cultivadas são utilizadas com intensa produção agrícola, o solo apresenta alterações espaciais e temporais em seus atributos físico-hídricos de modo que a viabilidade econômica da produção agrícola depende desses atributos, requerendo, consequentemente, estudos detalhados sobre a variabilidade espacial do solo. Desse modo, o objetivo do trabalho foi avaliar a variabilidade espacial da condutividade hidráulica saturada e da infiltração da água no solo, em uma área de 20 ha, caracterizada pela intensa produção de grãos, foi usado uma grade de 50 x 50 m, utilizando o permeâmetro de Guelph. Nas análises da variabilidade espacial, utilizaram-se os métodos geoestatísticos. Concluiu-se que os atributos físico-hídricos estudados apresentaram... |
| Tipo: Foram seguidos os métodos da Embrapa |
Palavras-chave: 5.01.00.00-9 Agronomia permeâmetro de Guelph; Geoestatística; Autocorrelação espacial Ciências do Solo; Física do Solo Guelph permeameter; Geostatistics; Spatial autocorrelation. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/959 |
| |
| Registros recuperados: 14 | |
|
|
|
