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LDT4QGIS: An open-source tool to enhance landscape analysis

Paixão, Luís; Machado, Rui

Despite the variety of landscape software available, new tools keep being developed in order to improve the existing analytical capabilities. Scripts, packages, or standalone software are built to enhance performance, add features or fulfil specific needs. This paper introduces LDT4QGIS, an open-source tool built exclusively to operationalize the Landscape Dynamics Typology method. LDT4QGIS is a Python-based to...


Sustainable Intensification of the Montado Ecosystem: Evaluation of Sheep Stock...

Carreira, Emanuel; Serrano, João; Shahidian, Shakib; Infante, Paulo; Paniágua, Luís; Moral, Francisco; Paixão, Luís; Pinto Gomes, C.; Lopes de Casto, J.

The objective of this study was to determine how application of dolomitic limestone and stocking methods (continuous stocking or deferred stocking) affect the soil compaction, sheep grazing location, height, and nutritional value of pastures when the pasture growth rate is at its maximum. A 4 ha field at Mitra farm—University of Évora—was divided into four plots: P1 and P2—without application of dolomitic limes...


Pasture Quality Assessment through NDVI Obtained by Remote Sensing: A Validatio...

Serrano, João; Shahidian, Shakib; Paixão, Luís; Marques da Silva, J.; Paniágua, Luís

Monitoring the evolution of pasture availability and quality throughout the growing season is the basis of grazing management in extensive Mediterranean livestock systems. Remote sensing (RS) is an innovative tool that, among many other applications, is being developed for detailed spatial and temporal pasture quality assessment. The aim of the present study is to evaluate the potential of satellite images (Sen...


INOVAÇÃO TECNOLÓGICA NA GESTÃO DO MONTADO: NOVAS FERRAMENTAS NO APOIO À TOMADA ...

Serrano, João; Carreira, E.; Martins, M.; Shahidian, Shakib; Paixão, Luís; Batista, E.; Marques da Silva, J.; Pereira, A.; Carvalho, M.

O montado é um ecossistema característico dos países de clima mediterrânico, representando o Alentejo a região de maior expressão em Portugal. É um sistema misto, agro-silvo-pastoril, que suporta a produção pecuária extensiva com baixos encabeçamentos animais. Nas últimas duas décadas a agricultura sofreu um forte impacto tecnológico associado ao conceito de Agricultura de Precisão. Este conceito corresponde a ...


Evolução da qualidade da pastagem no Montado: Monitorização a partir de imagens...

Serrano, João; Paixão, Luís; Marques da Silva, José

As pastagens são a principal fonte de alimento dos ruminantes em sistemas de produção animal extensivos. A monitorização da evolução da oferta de pastagem e, especialmente, da sua qualidade, ao longo do ciclo vegetativo é a base da gestão do pastoreio. A deteção remota (DR) é uma ferramenta que, entre outras aplicações, permite a monitorização, espacial e temporal, detalhada das culturas. Este estudo avaliou o ...


Definição e validação de zonas homogéneas de gestão (ZHG) na vinha: Estudo de caso

Serrano, João; Paixão, Luís; Marques da Silva, José; Moral, Francisco

No contexto atual, de subida dos custos dos fatores de produção, é essencial otimizar a gestão dos recursos disponíveis, o que pressupõe a incorporação de tecnologias que melhorem o conhecimento sobre as variáveis envolvidas no processo produtivo. Este estudo teve por objetivo demonstrar o interesse de definir e validar zonas homogéneas de gestão (ZHG) numa vinha. Para o efeito foram realizados dois levantament...

Date: 2024   |   Origin: Revista de Ciências Agrárias

Definition and Validation of Vineyard Management Zones Based on Soil Apparent E...

Serrano, João; Mau, Vasco; Rodrigues, Rodrigo; Paixão, Luís; Shahidian, Shakib; Marques da Silva, José; Paniagua, Luís; Moral, F.

In the current context of increasing costs of production factors, it is essential to optimize the management of available resources, seeking to incorporate technologies that improve knowledge of the variables involved in the agronomic production process. The aim of this study is to define and validate management zones (MZ) in a 3.3 ha vineyard located near Évora, in the South of Portugal. A contact sensor (“Ver...


Classifying Soil Type Using Radar Satellite Images

Ahmed, Md Sajib; Gonçalves, Teresa; Rato, Luis; Marques da Silva, José Rafael; Vieira, Filipe; Paixão, Luís; Salgueiro, Pedro

The growth of the crop is dependent on soil type, apart from atmospheric and geo-location characteristics. As of now, there is no direct and cost free method to measure soil property or to classify soil type. In this work, we proposed a machine learning model to classify soil type using Sentinel-1 satellite radar images. Further, the developed classifier achieved 72.17% F1-score classifying sandy, free and clay...


Classifying Soil Type Using Radar Satellite Images

Ahmed, Md Sajib; Gonçalves, Teresa; Rato, Luís; Marques da Silva, José Rafael; Vieira, Filipe; Paixão, Luís; Salgueiro, Pedro

The growth of the crop is dependent on soil type, apart from atmospheric and geo-location characteristics. As of now, there is no direct and costfree method to measure soil property or to classify soil type. In this work, we proposed a machine learning model to classify soil type using Sentinel-1 satellite radar images. Further, the developed classifier achieved 72.17% F1-score classifying sandy, free and clayi...


Evaluation of near infrared spectroscopy (NIRS) for estimating soil organic mat...

Serrano, João; Shahidian, Shakib; Silva, José Marques; Paixão, Luís; Carvalho, Mário; Moral, Francisco; Nogales-Bueno, Julio; Teixeira, Ricardo F.M.

The Montado is an agro-silvo-pastoral ecosystem characteristic of the Mediterranean region. Pasture productivity and, consequently, the possibilities for intensifying livestock production depend on soil fertility. Soil organic matter (SOM) and phosphorus (P2O5) are two indicators of the evolution of soil fertility in this ecosystem. However, their conventional analytical determination by reference laboratory me...


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