Search results for "Forestry"

Forest management optimization across spatial scales to reconcile economic and conservation objectives

2019

Conflicts between biodiversity conservation and resource production can be mitigated by multi-objective management planning. Optimizing management for multiple objectives over larger land areas likely entails trading off the practicability of the process against the goodness of the solution. It is therefore worthwhile to resolve how large areas are required as management planning regions to reconcile conflicting objectives as effectively as possible. We aimed to reveal how the extent of forestry planning regions impacts the potential to mitigate a forestry-conservation conflict in Finland, represented as a trade-off between harvest income and deadwood availability. We used forecasted data f…

Control de plagas y desarrollo institucional en la estación de Patología Vegetal de Burjassot (Valencia)

2006

The Estación de Patología Vegetal de Burjassot (Valencia), created in 1924, carried out important activities related to the control of pests, in varied fronts as original research, adaptation of techniques, and popularization. The biological control was highly practiced, and it was centered on orange pests. The chemical control of pests was also developed in this center.

Economic and Financial Comparison between Organic and Conventional Farming in Sicilian Lemon Orchards

2015

Sicily has a long tradition in citrus fruit cultivations that with vineyard and olive tree represent the main Mediterranean tree crops. In this paper we have evaluated the economic and financial sustainability of lemon production, both in organic farming and in conventional farming

Small changes, big impacts: Geographic expansion in small-scale fisheries

2020

Abstract Small-scale fisheries are an important, yet neglected, millenarian activity that has been undergoing significant changes that threaten its future. Understanding how this activity is spatially distributed and the factors that drive its use of the marine space over time can shed some light on how fishing efforts and their impacts have moved over different parts of coastal marine ecosystems. This study investigated changes to the spatial distribution of small-scale fisheries along the Brazilian equatorial region between 1994 and 2014 and the factors, from ecological to socioeconomic, that influenced this shift. Bayesian hierarchical spatial models were used together with environmental…

Morphological characterisation of soil structure in tilled fields: from a diagnosis method to the modelling of structural changes over time

2004

Characterisation of soit structure within the tilled layer of cultivated fields is crucial because the importance of this soil characteristic on the biological, chemical and physical properties of the soil and its repercussions on water cycle, root growth and functioning. We present in this paper a method for field characterisation of soil structure. This method, practised since the 1970s, was designed for field diagnosis of the effects of cropping systems on soil structure. It is based on a stratification of the observation face of a pit dug perpendicular to the direction of tillage and traffic: spatial compartments are distinguished, according to the nature of the mechanical stresses they…

Research strategies for the improvement of cactuspear (Opuntia ficus-indica) fruit quality and production

1995

Abstract Cactus pear ( Opuntia ficus-indica L.) is cultivated worldwide for fruit production either in the subsistence agriculture of dryland areas or as a cash crop. However, little horticultural research has been devoted to this species so far. Research needs related to reproductive biology as well as productivity and orchard management are outlined. A better knowledge of the environmental influence on reproductive biology and fruit quality, the control of fluctuations in plant cropping, as well as the reduction of seed number and size, are the major challenges for future research. Cactus pear will transcend the ethnical markets only if adequate marketing strategies can be promoted and fr…

Costs, revenues and incomes of Sicilian farms that cultivate cactus pear

2015

Sicily, placed at the center of the Mediterranean, for its favorable soil and climatic conditions, represents the main production area of cactus pear (Opuntia ficus-indica L. Miller) in Italy. In this context, the paper aims to estimate production costs, revenues and incomes of the Sicilian farms that cultivate cactus pear. The economic analysis has been carried out in the area of Santa Margherita Belice (AG), where the cultivation of cactus pear assumes a significant importance for the economy of the territory and where in last years many farmers have implanted specialized plantations also for the support granted by the EU agricultural policy. Economic analysis has involved 20 farms specia…

Fragmentation-related patterns of genetic differentiation in pedunculate oak (Quercus robur) at two hierarchical scales

2016

Populations at species' range margins are expected to show lower genetic diversity than populations at the core of the range. Yet, long-lived, widespread tree species are expected to be resistant to genetic impoverishment, thus showing comparatively high genetic diversity within populations and low differentiation among populations. Here, we study the distribution of genetic variation in the pedunculate oak (Quercus robur L.) at its range margin in Finland at two hierarchical scales using 15 microsatellite loci. At a regional scale, we compared variation within versus among three oak populations. At a landscape scale, we examined genetic structuring within one of these populations, growing …

Evolution of Competitive Strategies in Global Forestry Industries: Introduction

2006

Simultaneous optimization of harvest schedule and data quality

2015

In many recent studies, the value of forest inventory information in harvest scheduling has been examined. In a previous paper, we demonstrated that making measurement decisions for stands for which the harvest decision is uncertain simultaneously with the harvest decisions may be highly profitable. In that study, the quality of additional measurements was not a decision variable, and the only options were between making no measurements or measuring perfect information. In this study, we introduce data quality into the decision problem, i.e., the decisionmaker can select between making imperfect or perfect measurements. The imperfect information is obtained with a specific scenario tree fo…