This paper proposes the use of fuzzy decision trees for coffee rust warning, most economically important disease in world. The models were induced using field data collected during 8 years. Using different subsets attributes from original data, three distinct datasets constructed. class attribute, representing monthly infection rate, was used to construct six according two rates. Induced can be trigger alerts when estimated rates reach one thresholds. first threshold allows applying...

Heat waves usually result in losses of animal production since they are exposed to thermal stress inducing an increase mortality and consequent economical losses. Animal science meteorological databases from the last years contain enough data poultry business allow modeling due heat wave incidence. This research analyzes a database broiler associated climatic data, using mining techniques such as attribute selection classification (decision tree) model impact incidence on mortality. The...

A estimativa de conforto térmico na avicultura moderna é importante para que sistemas climatização possam ser acionados no tempo correto, diminuindo perdas e aumentando rendimentos. Embora a literatura corrente apresente alguns índices térmico, são aplicados essa estimativa, estes baseados apenas em condições do ambiente não consideram fatores importantes inerentes aos animais, tais como genética capacidade aclimatação, provendo, geralmente, uma inadequada das aves. Este trabalho desenvolveu...

Uma árvore de decisão foi desenvolvida com o objetivo auxiliar na compreensão manifestações epidêmicas da ferrugem do cafeeiro causada por Hemileia vastatrix. Taxas infecção calculadas a partir avaliações mensais incidência foram agrupadas em três classes: redução ou estagnação - TX1; crescimento moderado (até 5p.p.) TX2; e acelerado (acima 5p.p.)- TX3. Dados meteorológicos, carga pendente frutos (Coffea arabica) espaçamento entre plantas usados como variáveis explicativas das classes taxa...

O objetivo deste trabalho foi desenvolver árvores de decisão como modelos alerta da ferrugem-do-cafeeiro em lavouras café (Coffea arabica L.) com alta carga pendente frutos. Dados incidência mensal doença no campo coletados durante oito anos foram transformados valores binários considerando limites 5 e 10 pontos percentuais na taxa infecção. Foi gerado um modelo para cada infecção binária a partir dados meteorológicos do espaçamento entre plantas. é indicado quando infecção, prevista o prazo...

Um dos desafios da agricultura de precisão é oferecer subsídios para a definição unidades manejo posteriores intervenções. Portanto, o objetivo deste trabalho foi avaliar os atributos químicos do solo e produtividade cultura cana-de-açúcar por meio geoestatística mineração dados pela indução árvore decisão. A mapeada em uma área aproximadamente 23ha, utilizando-se critério célula, um monitor que permitiu elaboração mapa digital representa superfície produção estudo. Para determinar Argissolo...

Data assimilation has been widely used for improvement of crop models’ estimates, example to incorporate the effects external events or compensate calibration errors in large areas. The term describes multiple approaches those who want take advantage satellite imagery reduce uncertainty improve accuracy model estimates. Kalman Filters are among most methods achieving these goals. But their use new contexts, i.e., from open field protected environments, requires untangling aspects pipeline...

The aim of this study was to group temporal profiles 10-day composites NDVI product by similarity, which obtained the SPOT Vegetation sensor, for municipalities with high soybean production in state Paraná, Brazil, 2005/2006 cropping season. Data mining is a valuable tool that allows extracting knowledge from database, identifying valid, new, potentially useful and understandable patterns. Therefore, it used methods clusters generation means algorithms K-Means, MAXVER DBSCAN, implemented...

Objetivou-se, com este trabalho, o desenvolvimento de um sistema apoio à decisão para a recomendação uso e manejo da terra, integrando Sistema Especialista, Informações Geográficas, uma base dados interface interpretar entrada do usuário as mensagens passadas entre os subsistemas. O desenvolvido determina capacidade terra; recomenda usos adequados cada classe como também práticas conservação solo identifica áreas conflito comparando mapas terra mapa uso. Todos resultados podem ser...

The present research hypothesized that the thermal, lighting and acoustic environments in commercial swine farrowing rooms vary over time from crate to crate. This study was conducted on 27 replicates two North Central Indiana, each equipped with 60 crates. Temperature, relative humidity, light intensity, sound air velocity were continuously monitored estimated for at sow level, 48 h post-farrowing, which is usually a critical period piglet survivability. Average daily temperature all crates...

Coffee rust can cause severe yield losses if control measures are not taken. Warning models capable of generating useful information regarding to the application of fungicides, decreasing economic and environmental impacts. The aim this study was develop, compare select warning developed by data mining techniques in order predict coffee in years high low fruit load. For 13 (1998-2011), collected from an automatic weather station. independent variables were 23, obtained station, dependent...

Yield is the most often used metric of crop performance, and it can be defined as ratio between production, expressed a function mass or volume, cultivated area. Estimating fruit’s volume relies on manual measurements, procedure precision change from one person to another. Measuring fruits’ will also destroy samples; consequently, variation measured with different samples. Monitoring growth either based destructive tests, limited by human labour, too expensive scaled. In this work, we showed...

Sugarcane mills in Brazil collect a vast amount of data relating to production on an annual basis. The analysis this type database is complex, especially when factors varieties, climate, detailed management techniques, and edaphic conditions are taken into account. aim paper was perform decision tree from unit evaluate the actionable patterns found terms their usefulness for increasing production. revealed interpretable sugarcane yield (R2 = 0.617), certain which were had been previously...

Heat waves usually result in losses animal production as the animals are exposed to thermal stress, inducing an increase mortality and consequent economic losses. Animal science meteorological databases from recent years contain enough data poultry business allow for modeling due heat wave incidence. This research aimed at analyzing a database of broiler associated with climatic using mining techniques, such attribute selection classification (decision tree) model impact incidence on...

Resumo O objetivo deste trabalho foi avaliar o cultivo da cana-de-açúcar, em análise harmônica aplicada a uma série temporal de índices vegetação Modis, com representação dos termos harmônicos. Os dados diários precipitação pluvial para Estado São Paulo foram obtidos do Agritempo, acumulados período 16 dias das composições ao longo safras 2004/2005 2011/2012. Utilizaram-se índice por diferença normalizada (NDVI) e realce (EVI) séries temporais decompostas harmônicos pela harmônica. Para...

Patterns in the errors of three pedotransfer functions (PTFs) for estimating water retention at −10 and −1500 kPa were investigated using a data set Brazilian soils. Of PTFs, one was developed soils from temperate regions, different tropical areas, specifically based on We used classification tree models to obtain rules that represent patterns PTF errors, reflecting differences between measured predicted content values. These classified as acceptable or unacceptable according defined...

One issue in understanding the performance of pedotransfer functions (PTFs) is knowing soil properties that contribute most to PTF errors. Classification trees provide a means for identifying these properties. The objective this study was use classification tree identify patterns residuals. analysis applied PTFs developed by Vereecken and coworkers 1989 estimate water contents at −10 −1500 kPa. Errors below above certain threshold values were defined as acceptable unacceptable, respectively....