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Ordenação: data | alfabética

Mostrando 1 - 90 de 323 resultados.


Comparative study of hatching estimation methods of Rhipicephalus (Boophilus) microplus eggs. Reproductive parameters of Rhipicephalus (Boophilus) microplus are often evaluated. They are good indicators of resistance to commercial acaricides and of plant extracts? efficacy. The objective of th... ... Repositório: BDPA Ano de publicação: 2018
Parameter estimation of a demand forecasting function associated with behavior of weed using genetic algorithm. Repositório: BDPA Ano de publicação: 2017
Estimation of aboveground biomass stock in tropical savannas using photogrammetric imaging. The use of photogrammetry technology for aboveground biomass (AGB) stock estimation in tropical savannas is a challenging task and is still at a preliminary stage. This work aimed to use metrics deriv... ... Repositório: BDPA Ano de publicação: 2023
Tree height and tropical forest biomass estimation. Tropical forests account for approximately half of above-ground carbon stored in global vegetation. However, uncertainties in tropical forest carbon stocks remain high because it is costly and laborio... ... Repositório: BDPA Ano de publicação: 2013
Effects of body size on estimation of mammalian area requirements. Accurately quantifying species' area requirements is a prerequisite for effective area-based conservation. This typically involves collecting tracking data on species of interest and then conducting h... ... Repositório: BDPA Ano de publicação: 2020
Regularized quantile regression for SNP marker estimation of pig growth curves. Background: Genomic growth curves are generally defined only in terms of population mean; an alternative approach that has not yet been exploited in genomic analyses of growth curves is the Quantile R... ... Repositório: BDPA Ano de publicação: 2017
Estimation of genetic parameters for milking temperament in Holstein-Gyr cows. Introduction: Dairy cattle with poor temperament can cause several inconveniences during milking, leading to labor difficulties, increasing the risk of accidents with animals and workers, and compromi... ... Repositório: BDPA Ano de publicação: 2023
Estimation of genetic parameters in rubber progenies. This study was designed to evaluate the genetic variability, the potential for rubber yield and secondary traits of rubber tree progenies at three locations in the state of Sao Paulo. The experiments... ... Repositório: BDPA Ano de publicação: 2012
Estimation of genetic parameters in Pinus tecunumanii. Repositório: BDPA Ano de publicação: 2014
Repeatability estimation for mangaba selection using mixed models. The Mangaba (Hancornia speciosa Gomes) is a fruit tree rich in such vitamins, iron, calcium and protein, and plays an important social, cultural and economic role for farmers in the Cerrado and Caatin... ... Repositório: BDPA Ano de publicação: 2019
Satellite estimation of aboveground biomass and impacts of forest stand structure. Heterogeneous Amazonian landscapes and complex forest stand structure often make aboveground biomass (AGB) estimation difficult. In this study, spectral mixture analysis was used to convert a Landsat... ... Repositório: BDPA Ano de publicação: 2005
A Comparative analysis of satellite-based approaches for aboveground biomass estimation in the Brazilian Amazon. The moist tropical forest in the Amazon has been regarded as an important part in global carbon budget. Deforestation since the 1970s has made it an important carbon source, but the rapid growth of se... ... Repositório: BDPA Ano de publicação: 2008
Aboveground forest biomass estimation with Landsat and LiDAR data and uncertainty analysis of the estimates. Landsat Thematic mapper (TM) image has long been the dominate data source, and recently LiDAR has offered an important new structural data stream for forest biomass estimations. On the other hand, for... ... Repositório: BDPA Ano de publicação: 2012
Rice yield estimation based on weather conditions and on technological level of production systems in Brazil. Abstract - The objective of this work was to evaluate an estimation system for rice yield in Brazil, based on simple agrometeorological models and on the technological level of production systems. Thi... ... Repositório: BDPA Ano de publicação: 2013
Automated and estimation methods to count nodule number in common bean. The nodulation on legume roots is an important trait to evaluate the symbiotic efficiency, but very laborious and time spending, what can limit the effectiveness of legume breeding programs. Based on... ... Repositório: BDPA Ano de publicação: 2017
Estimation of energy flux and biomass in pasture areas through remote sensing techniques. Pasture production is estimated through remote sensing techniques with the aid of models and algorithms. The application with no need for extensive field measurements is one of the advantages of the S... ... Repositório: BDPA Ano de publicação: 2019
Net primary productivity of soybean using different data sources and estimation methods. Resumo: A Produtividade Primária Líquida (NPP) pode ser utilizada para quantificar o papel relativo do clima e das atividades humanas na dinâmica da vegetação. Dada sua importância, muitos modelos de... ... Repositório: BDPA Ano de publicação: 2022
Tropical-Forest Biomass Estimation at X-Band From the Spaceborne TanDEM-X Interferometer. This letter reports the sensitivity of X-band interferometric synthetic aperture radar (InSAR) data from the first dual-spacecraft radar interferometer, TanDEM-X, to variations in tropical-forest abov... ... Repositório: BDPA Ano de publicação: 2014
Low-cost class a evapotranspiration pan for reference evapotranspiration estimation in protected and field environments: a practical approach. Currently, there are various methods for determining the Class A pan coefficient (Kp) in estimating reference evapotranspiration (ETo), which is of utmost importance for water management in agricultur... ... Repositório: BDPA Ano de publicação: 2024
Use of low-cost class a evapotranspiration pan for reference evapotranspiration estimation in protected and field environments. Currently, there are various methods for determining the Class A pan coefficient (Kp) in estimating reference evapotranspiration (ETo), which is of utmost importance for water management in agricultur... ... Repositório: BDPA Ano de publicação: 2023
Efficiency of circulant diallels as compared to complete diallels for the estimation of combining ability. The efficiency of circulant and complete diallels was compared regarding the estimation of the general (GCA) and specific (SCA) combining ability. Maize population ear yield data from a 28 x 28 dialle... ... Repositório: BDPA Ano de publicação: 2004
Calibration of chlorophyll hand-held meter based on vineyard NDVI zones for estimation of leaf N content. The monitoring of chlorophyll content in grapevine leaves allows us to evaluate their N status, assisting with the information for the decision make about nutrient rate and application time to the vin... ... Repositório: BDPA Ano de publicação: 2022
An overall estimation of losses caused by diseases in the Brazilian fish farms. Parasitic and infectious diseases are common in finfish, but are difficult to accurately estimate the economic impacts on the production in a country with large dimensions like Brazil. The aim of this... ... Repositório: BDPA Ano de publicação: 2017
Estimation of genetic parameters for test-day milk yield in holstein cows using a random regression model. Test-day milk yield records of 11,023 first-parity Holstein cows were used to estimate genetic parameters for milk yield during different lactation periods. (Co)variance components were estimated usin... ... Repositório: BDPA Ano de publicação: 2005
Estimation of available water in soils by NMR relaxometry. Repositório: BDPA Ano de publicação: 2013
Estimation of genetic parameters of Plukenetia volubilis L. seed germination. Plukenetia volubilis L. é uma espécie que necessita de seleção para a viabilização de sua exploração comercial, principalmente quanto à qualidade das sementes, pois populações com germinação rápida e... ... Repositório: BDPA Ano de publicação: 2013
Estimation of genetic parameters for mature weight in sheep Santa Inês. Repositório: BDPA Ano de publicação: 2013
Taper equations for tree diameter and volume estimation in silvipastoral systems. Repositório: BDPA Ano de publicação: 2015
Estimation of field capacity from ring infiltrometer-drainage data. A Capacidade de Campo (CC) é um parâmetro largamente adotado na Ciência do Solo aplicada. Entretanto, seu método de determinação in situ pode apresentar dificuldades, geralmente por conta da necessida... ... Repositório: BDPA Ano de publicação: 2014
Estimation of herbicide bioconcentration in sugarcane (Saccharum officinarum L.). Abstract: Sugarcane is an important crop for sugar and biofuel production in Brazil. Growers depend greatly on herbicides to produce it. This experiment used herbicide physical-chemical and sugarcane... ... Repositório: BDPA Ano de publicação: 2015
Estimation of genetic parameters in Brachiaria decumbens hybrids. Repositório: BDPA Ano de publicação: 2015
Truncated beta nonlinear regression models for soil-water characteristic curves estimation. We propose an alternative approach for estimating soil-water characteristic curves based on truncated beta nonlinear regression models. Thus, assuming that the response variable follows a truncated be... ... Repositório: BDPA Ano de publicação: 2013
Genomic selection in forage breeding: designing an estimation population. Repositório: BDPA Ano de publicação: 2013
Biomass estimation of agroforestry in Paraná, Brazilian Amazon. Repositório: BDPA Ano de publicação: 2010
Parameter estimation for ridge detection in images with thin structures. Repositório: BDPA Ano de publicação: 2010
A genetic algorithm for citrus tree counting and canopy diameter estimation. The objective of this work is to present the GeoCitrus system, developed in Java, for automatic counting of citrus tree. The work was performed experimentally, in specific areas of interest, through t... ... Repositório: BDPA Ano de publicação: 2009
Estimation of competition parameters in common bean plants. The objective of this study was to estimate parameters related to the ability of competing or tolerating competition. The experiments were conducted in three seasons, using eight common bean lines wit... ... Repositório: BDPA Ano de publicação: 2007
Estimation of carbon stock and nitrogen in the semiarid region. The management and use of the soil in semi-arid areas, over time have caused significant decreases of carbon (C) and nitrogen (N) in these soils, due to the fact that it is a region where normally eno... ... Repositório: BDPA Ano de publicação: 2018
Estimation biomass of pasture areas using WorldView-2 data. The sustainable use of pastures is of fundamental importance, given that a considerable part of the Brazilian pastures may be in process of degradation or degraded (Andrade et al., 2016). In general,... ... Repositório: BDPA Ano de publicação: 2016
Estimation biomass of pasture areas using WorldViiew-2 data Repositório: BDPA Ano de publicação: 2016
Accurate estimation of commercial volume in tropical forests. Accurate estimates of commercial volume in tropical forests are key for the implementation of sustainable forest management plans. Because of the lack of local or generic volumetric equations, most fo... ... Repositório: BDPA Ano de publicação: 2020
Estimation of chilling accumulation for blackberry (Rubus sp.) using mathematical models. As the climate change takes place, the cultivation of temperate climate crops in subtropical areas has become a challenge. The success of fruit crops, such as blackberry, in certain areas depends basi... ... Repositório: BDPA Ano de publicação: 2021
Estimation of greenhouse gas abatement potential for the sugar-energy sector. Abstract: In 2017, Brazil established the National Biofuel Policy (RenovaBio), a state program that aims to boost the production and use of biofuels in the country in more sustainable standards, throu... ... Repositório: BDPA Ano de publicação: 2020
Development of a protocol aiming at the estimation of pigment contents in maize leaves by hyperspectral remote sensing. The goal of this study was to develop and validate a protocol for the estimation of photosynthetic pigment contents in maize leaves using algorithms derived from hyperspectral images generated from vi... ... Repositório: BDPA Ano de publicação: 2017
Performance of the SSEBop model in the estimation of the actual evapotranspiration of soybean and bean crops. The objective of this work was to evaluate the performance of the operational simplified surface energy balance (SSEBop) model in the estimation of the actual evapotranspiration (ETa) of soybean and b... ... Repositório: BDPA Ano de publicação: 2019
Forage mass estimation in silvopastoral and full sun systems: evaluation through proximal remote sensing applied to the SAFER model. Abstract: The operational slowness in the execution of direct methods for estimating forage mass, an important variable for defining the animal stocking rate, gave rise to the need for methods with fa... ... Repositório: BDPA Ano de publicação: 2023
An AFLP estimation of the outcrossing rate of Spondias tuberosa (Anacardiaceae), an endemic species to the Brazilian Semiarid region. The umbu tree (Spondias tuberosa) is one of the most important endemic species to the Brazilian tropical semiarid region. The umbu tree has edible fruits with a peculiar flavor that are consumed in na... ... Repositório: BDPA Ano de publicação: 2013
Estimation of genetic parameters and verification of early selection efficiency in baru (Dipteryx alata). This study aimed at verifying the efficiency of early selection, and estimating the genetic parameters in Dipteryx alata. The 66 half-sib families were obtained from three seed provenances at the Braz... ... Repositório: BDPA Ano de publicação: 2014
Estimation of deposit and spray distribution in hydro sensible paper and morning glory plants. The present work aimed to quantify the effects of surfactants addition over deposition and distribution of sprayer suspension in natural and artificial targets associated with different nozzles in rel... ... Repositório: BDPA Ano de publicação: 2014
Estimation of phytomass stock through satellite imagery in a semiarid area in Pernambuco state, Brazil. The objective of our study was to developed equations to estimate vegetation biomass based on satellite data and to apply these equations to the vegetation in a 35000 km2 pilot area in the semiarid re... ... Repositório: BDPA Ano de publicação: 2015
Revisiting field capacity (FC): variation of definition of FC and its estimation from pedotransfer functions. Levando em conta a natureza dos processos hidrológicos envolvidos na medição da Capacidade de Campo (CC) in situ, este estudo propõe uma variação da definição de CC a fim de minimizar as impropriedade... ... Repositório: BDPA Ano de publicação: 2014
Follicular population on the estimation of the superovulatory response in Santa Ines sheep. Abstract: The aim was to verify the correlation between follicular population count, superovulatory response and the recovery of viable structures in the in vivo production of sheep embryos. Twenty-fi... ... Repositório: BDPA Ano de publicação: 2016
Estimation of climatological water deficit in an experimental watershed in the brazilian cerrado. ABSTRACT: This study aimed to estimate the probability of climatological water deficit in an experimental watershed in the Cerrado biome, located in the central plateau of Brazil. For that, it was use... ... Repositório: BDPA Ano de publicação: 2016
Crop yield, genetic parameter estimation and selection of sacha inchi in central Amazon. Desempenho produtivo, estimativa de parâmetros genéticos e seleção de sacha inchi na Amazônia central. este trabalho objetivou analisar, na região da Amazônia central, diferentes acessos dessa trepade... ... Repositório: BDPA Ano de publicação: 2017
Use of automation for feed intake estimation, weight gain and feed efficiency in beef catle. The objective of this study was to verify the correlation of residual feed intake, gain and body weight variables obtained by traditional weighing methods and daily weighing using an automated scale,... ... Repositório: BDPA Ano de publicação: 2018
Estimation of sediment production in oil palm expansion areas in the Amazon. Atualmente, uma atividade que se tornou estratégica a nível nacional é o cultivo da palma de óleo (Elaeis guineensis) na região nordeste do estado do Pará, na Amazônia oriental brasileira. Entretanto,... ... Repositório: BDPA Ano de publicação: 2018
Vegetation sensors as a tool for plant population identification and corn grain yield estimation. Absract: The estimated corn grain yield is dependent on plant density and should be monitored from the beginning of its development, especially between the phenological stages V3 and V10, since these... ... Repositório: BDPA Ano de publicação: 2021
Estimation of genetic parameters for growth traits in Tabapuã cattle using a multi-trait model. Repositório: BDPA Ano de publicação: 2013
Sensitivity of APSIM/ORYZA model due to estimation errors in solar radiation. Abstract: Crop models are ideally suited to quantify existing climatic risks. However, they require historic climate data as input. While daily temperature and rainfall data are often available, the l... ... Repositório: BDPA Ano de publicação: 2012
Sensory shelf life estimation of an instant soy-coffee beverage by survival analysis. Repositório: BDPA Ano de publicação: 2013
Estimation of phenolic compounds in tropical red wines from Northeast Brazil. Since the 1980s, viticulture has been developed in an are a between 8° and 90S latitude of northeast Brazil. This area presents an intraannual c1imate variability, with an annual average temperature o... ... Repositório: BDPA Ano de publicação: 2010
Bayesian hierarchical models to improve estimation of diet composition by alkane profiles. Alkane profiles in forage and feces are used to determine diet composition, essentially by inverting a linear mixing equation. Depending on the number of dietary components, number of alkanes and diff... ... Repositório: BDPA Ano de publicação: 2011
Objective sampling estimation of crop area based on remote sensing images. Repositório: BDPA Ano de publicação: 2011
Cold and hot extraction for enchytraeid abundance estimation in a fragment of mixed Araucaria forest in Brazil. Repositório: BDPA Ano de publicação: 2012
Estimation of soil moisture in the root-zone from remote sensing data. Repositório: BDPA Ano de publicação: 2013
Bayesian inference in genetic parameter estimation of visual scores in Nellore beef-cattle The aim of this study was to estimate the components of variance and genetic parameters for the visual scores which constitute the Morphological Evaluation System (MES), such as body structure (S), pr... ... Repositório: BDPA Ano de publicação: 2009
Estimation of phenolic compounds in tropical red wines elaborated in Northeast Brazil. Vitiviniculture has been developed since 1980's in an area between 8° and 9 o S Iatitudeof Northeast BraziI. This area presents an intra-annua?l climate variability, with an annual average temperature... ... Repositório: BDPA Ano de publicação: 2008
Resistance to Enneothrips flavens Moulton and genetic parameters estimation in interspecific genotypes of peanut. Peanut is an oilseed crop of great importance for Brazilian agribusiness. A major factor affecting its production is pest incidence, mainly thrips. This study aimed to evaluate the potential for resis... ... Repositório: BDPA Ano de publicação: 2017
Estimation of genetic progress after eight cycles of recurrent selection for common bean grain yield. The objective of this study was to estimate the genetic progress of eight cycles of recurrent selection for common bean lines with high yield. The base population was obtained from 10 parents differin... ... Repositório: BDPA Ano de publicação: 2010
Estimation of phenotypic diversity in field populations of Magnaporthe grisea from two upland rice cultivars. Estimativa de diversidade fenotípica nas populações de Magnaporhe grisea de duas cultivares de arroz de terras altas A diversidade fenotípica de Magnaporthe grisea foi avaliada baseada em amostras de... ... Repositório: BDPA Ano de publicação: 2007
Estimation of repeatability and number of evaluations for characterization of mango germplasm. This work aimed estimate the coefficient of repeatability for total fruit numbers per tree (TFT) fruit production per tree (FPT), fruit weight average (FWA), pulp weight (PW), skin weight (SW), stone... ... Repositório: BDPA Ano de publicação: 2004
Prediction of genotypic values and estimation of genetic parameters in common bean. Dezoito genótipos de feijoeiro (Phaseolus vulgaris L.) foram avaliados em 25 ambientes do estado de São Paulo durante os anos de 2001 e 2002. As estimativas de parâmetros genéticos por REML e a prediç... ... Repositório: BDPA Ano de publicação: 2008
Influence of the environmental index on the estimation of stability parameters of Eberhart and Russell. The objective of this study was to verify the influence of the environmental index on the analysis and estimates of adaptability and stability parameters, using environmental indices obtained from 4 g... ... Repositório: BDPA Ano de publicação: 2004
Estimation of the Weibull distribution form parameter as a function of the scale parameter by the percentile method. ABSTRACT - Among the probability density functions that estimate and project diametric distributions, the Weibull function is one of the most studied, and the percentile method is an alternative appro... ... Repositório: BDPA Ano de publicação: 2022
Estimation of genetic parameters and prediction of breeding values for fruit-quality traits in hybrid mangoes. Genetic parameters to fruit quality of mango hybrids were estimated using a mixed model REM/BLUP. Twenty-seven hybrids (Tommy Atkins cross with Haden, Palmer, Van Dyke, Kent and Coquinho) were evaluat... ... Repositório: BDPA Ano de publicação: 2022

Mostrando 1 - 90 de 323 resultados.

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