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Generating fuzzy rules by learning from olive tree transpiration measurement - ...

The present study aims at developing an intelligent system of automating data analysis and prediction embedded in a fuzzy logic algorithm (FAUSY) to capture the relationship between environmental vari- ables and sap flow measurements (Granier method). Environmental thermal gradients often interfere with Granier sap flow measurements since this method uses heat as a tracer, thus introducing a bias in transpirati...

Water requirements and footprint of a super intensive olive grove under Mediter...

Abstract The water footprint of a product can be described as the volume of freshwater used to produce it, associated to a geographic and temporal resolution. For crops, the water footprint relates crop water requirements and yield. The components of water footprint, blue, green and grey water footprints, refer to the volumes of respectively, surface and groundwater, rainfall, and water required to assimilate p...

Pegada hídrica de um olival super-intensivo sob clima mediterrânico, utilizando...

A pegada hídrica de uma cultura representa o volume de água necessário para produzir, relacionando as necessidades hídricas da cultura com a produção. As suas componentes, pegadas hídricas azul, verde e cinzenta, referem-se respectivamente aos volumes de água superficial e subterrânea, precipitação e de água necessária para assimilar a poluição utilizados pela cultura. A determinação das pegadas hídricas azul e...

Sustainable Soil Water Management Systems

Soil quality and its management must be considered as key elements for an effective management of water resources, given that the hydrological cycle and land management are intimately linked (Bossio et al. 2007). Soil degradation has been described by Bossio et al. (2010) as the starting point of a negative cycle of soil-water relationships, creating a positive, self-accelerating feedback loop with important ne...

Pegada hídrica de um olival super-intensivo sob clima mediterrânico utilizando ...

The water footprint of a crop is the volume of water that is necessary to produce, therefore relating crop water requirements and yield. The components of water footprint, blue, green and grey water footprints refer to the volumes of respectively, surface and groundwater, rainfall, and water required to assimilate pollution, which are used to produce the crop yield. Determining blue and green water footprints i...

Resposta do olival intensivo e super-intensivo a dois regimes de rega: parâmetr...

Olive grove irrigation has substantially increased in the past years on the region of Alentejo (southern Portugal). The correct determination of the plant water requirements is one of the key factors on the orchard management. This work evaluates the response of two varieties of Olea europaea, Cobrançosa in an intensive grove (hereafter named FEA) and Arbequina in a hedgerow orchard (hereafter named OSul), subj...

Modelação das necessidades hídricas de olivais regados utilizando variáveis e p...

Estudos desenvolvidos na região de Moura, Alentejo, em olival permitiram quantificar a transpiração (T) das plantas para diversas modalidades de rega e utilizar esta informação para o desenvolvimento de uma equação de estimativa de T, através da relação entre T, e índices de vegetação (IVs) calculados a partir de informação obtida por detecção remota. Pretende-se alargar o âmbito deste trabalho de modelação e c...

Utilização da equação de Hargreaves Samani para o cálculo da ETo em estufas

Poster ; A equação de Hargreaves Samani, HS, tem sido utilizada com sucesso para o cálculo da Evapotranspiração, Eto, ao ar livre. Os resultados indicam uma boa correlação entre a Eto obtida por este método e a obtida pelo método de Penman-Monteith, PM, que exige um conjunto maior de parâmetros. Até a data pouco se sabe sobre a aplicabilidade da equação de HS em agricultura protegida. Neste ensaio foram instal...

Effect of sodium and nitrogen on yield function of irrigated maize in Southern ...

Salinization and nitrate leaching are two of the leading threats to the environment of the European Mediterranean regions. Inefficient use of water and fertilizers has led to a nitrate increase in the aquifers and reduction in crop yields caused by salts. In this study, a triple emitter source irrigation system delivers water, salt (Na+), and fertilizer (N) applications to maize (Zea mays L.). The objective of ...

Drip irrigation using a PLC based adaptive irrigation system