Encontrados 18 documentos, a visualizar página 1 de 2

Comparação entre perfis térmicos do solo e do ar num montado de sobro

Os montados de sobro, pela área que ocupam (cerca de 700000 ha) e por serem fonte de cortiça, de pastagens, de plantas aromáticas e medicinais, de madeira e de habitat para espécies cinegéticas, constituem sistemas agroflorestais de enorme importância nas economias das áreas rurais do sul de Portugal. A sua sustentabilidade a longo prazo está dependente da sua gestão. O pedoclima e as características termodinâ...

A data mining approach to improve multiple regression models of soil nitrate co...

The changes in the soil nitrate concentration were studied during 2 years in a ‘‘montado’’ ecosystem, in the South of Portugal. Total rainfall, air and soil temperature and soil water content under and outside Quercus rotundifolia canopy were also evaluated. A cluster analysis was carried out using climatic and microclimatic parameters in order to maximize the intraclass similarity and minimize the interclass s...

A data mining approach to improve multiple regression models of soil nitrate co...

The changes in the soil nitrate concentration were studied during 2 years in a ‘‘montado’’ ecosystem, in the South of Portugal. Total rainfall,air and soil temperature and soil water content under and outside Quercus rotundifolia canopy were also evaluated. A cluster analysis was carried out using climatic and microclimatic parameters in order to maximize the intraclass similarity and minimize the interclass si...

Soil digital mapping with reduced soil samples under agro-silvo-pastoral systems.

Soil depth (SD), clay content (SCC) and soil organic carbon (SOC) determine land use systems response but are quite expensive to be mapped in high definition. This study uses proximal sensing, tree canopy influence and cokriging (CK) to explore soil sampling reduction in soil digital mapping for low income land use systems. It applies to 5.34 ha of “montado” in central-south of Portugal with rolling morphology ...

Microclimatic specificity of a Mediterranean oak woodland (montado) in context ...

The effects of oak trees on microclimatic parameters in Quercus rotundifolia Lam. woodland in Alentejo, Southern Portugal, are reported. The results show that oak trees create a marked differentiation in the grass matrix between open and tree-canopied habitats. Compared to open areas, oak canopy cover is associated with lower soil moisture content, lower soil temperature and lower photosynthetically active radi...

Microclimatic specificity of a Mediterranean oak woodland (montado) in the cont...

The effects of oak trees on microclimatic parameters in Quercus rotundifolia Lam. woodland in the Alentejo, Southern Portugal, are reported. Results show that oak tree create a marked differentiation in the grass matrix, between open and undercanopy areas. Compared to open areas, it presents lower soil moisture beneath the oak canopy, lower soil temperatures and lower photosynthetically active radiation (PAR). ...

Espiritualidade sacerdotal ministerial : o contributo de João Paulo II nas Cart...

Influence of Quercus ilex trees on herbaceous production and nutrient concentra...

In an open woodland in Portugal, the nature of interactions between Quercus ilex trees and herbaceous plants was assessed during 2 years by studying how manipulation of incident solar radiation, water and nutrient supply affect the herbaceous biomass and N, K, P, Ca, Mg, and Mn concentrations. Measurements were carried out in three environments consisting of (1) open grassland, (2) beneath the tree canopy, and ...

The Montado agroforestry system microclimatic specificity in the context of glo...

The effects of oak trees on microclimatic parameters in Quercus rotundifolia Lam. woodland in the Alentejo, Southern Portugal, are reported. Results show that oak tree create a marked differentiation in the grass matrix, between open and undercanopy areas. Compared to open areas, it presents lower soil moisture beneath the oak canopy, lower soil temperatures and lower photosynthetically active radiation (PAR). ...

Propagating Fine-Grained Topic Labels in News Snippets