This paper applies the replacement cost method for calculating the value of stochastic carbon sink in the EU climate policy for mitigating carbon dioxide emissions. Minimum costs with and without carbon sinks are then derived with a safety-first approach in a chance constrained framework for current system with an emission trading system and national allocation plans and a hypothetical system where all sectors trade. The theoretical results show that i) the value of carbon sink approaches zero for high enough risk discount, ii) relatively low abatement cost in the trading sector curbs supply of permits on the ETS market, and iii) large abatement costs in the trading sector create values from carbon sink for meeting national targets. The empirical application to the EU commitment of 20% reduction in carbon dioxides shows large variation in carbon sink value depending on risk discount and on institutional set up. Under no uncertainty, the value can correspond to approximately 0.45% of total GDP in EU under current policy system, but it is reduced to one third if all sectors are allowed to trade. The values are unevenly allocated among countries, but in different ways depending on EU policy; under current system countries make gains from reduced costs of meeting national targets, under a sector wide trading scheme buyers of permits gain from reductions in permit price and sellers make associated losses.
This document summarises the outcome of a training workshop, "Inter-active and dynamic approaches on forest and land-use planning", that was organised in Vietnam and Lao PDR during April 1999. The workshop was arranged by researchers from SLU, Umea in co operation with Sida and it's CCB Programme, the National Board of Forestry and concerned government institutions in Lao PDR-the National Programme for Shifting Cultivation Stabilisation, Ministry of Agriculture and Forestry and in Vietnam-the Forest Inventory and Planning Institute, Ministry of Agriculture and Rural Development. The main purposes of this paper are • To review and conclude the outcome of the workshop to all those who have participated or been concerned with it. • To summarise an evaluation of the somewhat unique arrangement, with participants from different sectors, administrative levels, gender and countries. • To present "the APM approach" on land use planning, which was put forward, tested and discussed during the workshop. The input to the working paper originates from participants, resource persons and instructors who took part in the workshop. The editing has been made by Mats Sandewall.
This document summarises the outcome of a regional training workshop, "Interactive and dynamic approaches on forest and land use planning in Southern Africa". It was organised in December 2001 by the government of Botswana in cooperation with organisations in Zimbabwe and South Africa and with Swedish financial and technical support. The workshop aimed at exposing the participants to new cross sector approaches on strategic forest and land use planning, including the Area Production Model (APM) and concept, and to provide a platform for possible future development work in this field. It concerned such issues as the role of planning in relation to policies and local development, information and data needs in planning, the use of scenario modelling in land use planning, how to narrow the gap between "planning from above" and "planning from below", and the roles and interaction of different stakeholders in the planning process. The workshop had been proposed by the participating countries following an international training programme on policy and strategy development in Sweden. The 18 participants from three countries included central and local government staff concerned with forest and land use planning at the national and sub-national level, researchers and NGOs. The workshop consisted of two weeks of lectures, seminars and field based case studies and a concluding seminar, in which the participants presented their experiences and conclusions about the APM concept to a broader group of decision makers. Some of the main conclusions drawn by the participants were that the APM was a useful tool for promoting dynamic and multi-sector planning. At the same time the Model has a number of technical shortcomings that needs to be addressed. Those shortcomings were identified and discussed throughout the workshop. The need to keep the model simple and transparent was acknowledged. It was proposed that "homes" should be identified for the model in each country. Those homes should build up and maintain capacity to develop and adapt the model to the local conditions and priorities. INTRODUCTION. The workshop "Interactive and dynamic approaches on forest and land-use planning in Southern Africa" was arranged in Botswana in December 2001. It aimed at exposing the participants to new cross sector approaches on strategic forest and land use planning, including the Area Production Model (APM), and to provide a platform for possible future development work in this field. The workshop was the concluding step of a process that had been running for several years. It provides important lessons on approaches to cross-sectoral land use planning in Southern Africa. The process started in 1998, when there were several participants from Botswana, South Africa and Zimbabwe in an annual international course "Development of National Forest Policies and Strategies", organised by the Swedish National Board of Forestry and funded by Sida. Those participants strongly suggested that the Area Production Model, (APM), which had been demonstrated during the course, might be highly relevant in Southern Africa. As a response, the Country Capacity Building (CCB) project (a Sida funded project aiming at forest policy issues), set up a training programme in discussions with the three countries. As a first step, key personnel from the forest authorities in Botswana, South Africa and Zimbabwe, underwent a post graduate course at the Swedish University of Agricultural Sciences (SLU) in Umea, Sweden. The course took place in March 2000 and was focused on the ideas and applications of the APM. In a second step, a workshop designated for a wider audience, including governmental as well as non governmental organisations, was planned for mid 2000. The workshop was originally intended to be a two-phase arrangement. The first phase to be arranged in Zimbabwe, focusing on model theory with only limited field work, and a second phase, were the participants would split up and work a realistic case in a designated study area in each of the three countries involved. Unfortunately, the political situation in Zimbabwe during spring 2000 made it necessary to postpone the workshop. About a year later, in spring 2001, it was agreed among the interested countries to move it to another country in the Region, after the Ministry of Agriculture, Botswana, had generously accepted to host the workshop. The two-phase design of the workshop was by now reduced to a single event, with the joint study-area around Serowe in the eastern part of Botswana. The APM is a simulation model developed by Professor Nils-Erik Nilsson in co-operation with FAO. The Model, including an application concept, has been further developed by the Swedish University of Agricultural Sciences (SLU), Department of Forest Resource Management and Geomatics. The Swedish team of resource persons in the Botswana workshop have all been instrumental in the previous development work of the Model. The APM has been field tested on numerous occasions in South and Southeast Asia. This workshop, however, is the first occasion the model is used in Southern Africa. In spite of the simplicity and flexibility that characterises the model, the new setting was considered a major challenge when planning the workshop. The workshop results have given new and partly unexpected results in terms of both usefulness and applicability of the model. The Country Capacity Building project focuses on forest policy development. In modem terminology, nfp (national forest programmes) is a highly relevant term. Key strategies include support to demand driven processes, investment in human knowledge and, not least, a belief that personal commitment is as important for success as political commitments. On behalf of the organisers, I would like to thank the Ministry of Agriculture, Botswana, and the key persons from Botswana, South Africa and Zimbabwe. Without their commitment and enthusiasm, the positive outcome of the workshop would not have been possible.
The global growth in energy demand continues, but the way of meeting rising energy needs is not sustainable. The use of biomass energy is a widely accepted strategy towards sustainable development that sees the fastest rate with the most of increase in power generation followed by strong rises in the consumption of biofuels for transport. Agriculture, forestry and wood energy sector are the leading sources of biomass for bioenergy. However, to be acceptable, biomass feedstock must be produced sustainably. Bioenergy from sustainably managed systems could provide a renewable and carbon neutral source of energy. Bioenergy systems can be relatively complex, intersectoral and site- and scale-specific. The environmental benefits of biomass-for-energy production systems can vary strongly, depending on site properties, climate, management system and input intensities. Bioenergy supply is closely linked to issues of water and land use. It is important to understand the effects of introducing it as well as it is necessary to promote integrated and synergic policies and approaches in the sectors of forestry, agriculture, energy, industry and environment. Biofuels offer attractive solutions to reducing GHG emissions, addressing energy security concerns and have also other socio-economic advantages. Currently produced biofuels are classified as first-generation. Some first-generation biofuels, such as for example ethanol from corn possibly have a limited role in the future transport fuel mix, other ones such as ethanol from sugarcane or biodiesel made from oils extracted from rerennial crops, as well as non-food and industrial crops requiring minimal input and maintenance and offering several benefits over conventional annual crops for ethanol production are promising. Sugarcane ethanol has greenhouse gas (GHG) emissions avoidance potential; can be produced sustainably; can be cost effective without governments support mechanisms, provide useful and valuable co-products; and, if carefully managed with due regard given to sustainable land use, can support the drive for sustainable development in many developing countries. Sugarcane ethanol - currently the most effective biofuel at displacing GHG emissions - is already mitigating GHGs in Brazil. Jatropha curcas L., a multipurpose, drought resistant, perennial plant has gained lot of importance for the production of biodiesel. However, it is important to point out that nearly all of studies have overstated the impacts of first-generation biofuels on global agricultural and land markets due to the fact that they have ignored the role of biofuel by-products. However, feed by-products of first-generation biofuels, such as dried distillers grains with soluble and oilseed meals are used in the livestock industry as protein and energy sources mitigates the price impacts of biofuel production as well as reduce the demand for cropland and moderate the indirect land use consequences. The production of second generation biofuels is expected to start within a few years. Many of the problems associated with first-generation biofuels can be solved by the production of second generation biofuels manufactured from abundant ligno-cellulosic materials such as cereal straw, sugar cane bagasse, forest residues, wastes and dedicated feedstocks (purpose-grown vegetative grasses, short rotation forests and other energy crops). These feedstocks are not food competitive, do not require additional agricultural land and can be grown on marginal and wasteland. Depending on the feedstock choice and the cultivation technique, second-generation biofuel production has the potential to provide benefits such as consuming waste residues and making use of abandoned land. As much as 97-98% of GHG emissions could be avoided by substituting a fossil fuel with wood fuel. Forest fertilization is an attractive option for increasing energy security and reducing net GHG emission. In addition to carbon dioxide the emissions of methane and nitrous oxides may be important factors in GHG balance of biofuels. Forest management rules, best practices for nitrogen fertilizer use and development of second generation technologies use reduce these emissions. Soils have an important role in the global budget of greenhouse gases. However, the effects of biomass production on soil properties are entirely site and practice-specific and little is known about long-term impact. Soil biological systems are resilient and they do not show any lasting impacts due to intensive site management activities. Land management practices can change dramatically the characteristic and gas exchange of an ecosystem. GHG benefits from biomass feedstock use are in some cases significantly lower if the effects of direct¹ or indirect (ILUC²) land use change are taken into account. LUC and ILUC can impact the GHG emission by affecting carbon balance in soil and thus ecosystem. To understand carbon fluxes in an ecosystem large ecosystem units and time scale are critical. Mitigation measures of the impact of land use change on greenhouse gas emissions include the use of residues as feedstock, cultivation of feedstock on abandoned arable land and use of feedstock by-products as substitutes for primary crops as animal feed. Cropping management is the other key factor in estimating GHG emissions associated with LUC and there is significant opportunity to reduce the potential carbon debt and GHG emissions through improved crop and soil management practices, including crop choice, intensity of inputs, harvesting strategy, and tilling practices. Also a system with whole trees harvesting with nutrient compensation is closely to being greenhouse-gas-neutral. Biochar applied to the soil offers a direct method for sequestrating C and generating bioenergy. However, the most recent studies showing that emissions resulting from ILUC are significant have not been systematically compared and summarized and current practices for estimating the effects of ILUC suffer from large uncertainties. Therefore, it seems to be delicate to include the ILUC effects in the GHG emission balance at a country level. The land availability is an important factor in determining bioenergy sustainability. However, even though food and biofuel/biomass can compete for land, this is not inevitably the case. The pattern of completion competition will e.g. depend on whether food security policies are in place. Moreover, the great potential for uncomplicated biomass production lies in using residues and organic waste, introduction of second generation biofuels which are more efficient in use of land and bioresources as well as restoration of degraded and wasted areas. Agroforestry has high potential for simultaneously satisfying many important objectives at ecosystems, economic and social levels. For example, as a very flexible, but low-input system, alley cropping can supply biomass resources in a sustainable way and at the same time provide ecological benefits in Central Europe. A farming system that integrates woody crops with conventional agricultural crops/pasture can more fully utilize the basic resources of water, carbon dioxide, nutrients, and sunlight, thereby producing greater total biomass yield. Overall, whether food prices will rise in parallel to an increase in biofuel demand will depend, more on trade barriers, subsidies, policies and limitations of marketing infrastructure than on lack of physical capacity. There are plant species that provide not only biofuel resources but also has the potential to sequestrate carbon to soil. For example, reed canary grass (RCG, Phalaris arundinacea L.) indicates the potential as a carbon sink. Harvest residues are increasingly utilized to produce energy. Sweden developed a series of recommendations and good-practice guidelines (GPG) for whole tree harvesting practices. Water has a multifarious relationship to energy. Biofuel production will have a relatively minor impact on the global water use. It is critically important to use low-quality water sources and to select the crops and countries that (under current production circumstances) produce bioenergy feedstock in the water-efficient way. However, local and regional impacts of biofuel production could be substantial. Knowledge of watershed characteristics, local hydrology and natural peak flow patterns coupled with site planning, location choice and species choice, are all factors that will determine whether or not this relationship is sustainable. For example, bioethanol's water requirements can range from 5 to 2138 L per liter of ethanol depending on regional irrigation practices. Moreover, sugarcane in Brazil evaporates 2,200 liters for every liter of ethanol, but this demand is met by abundant rainfall. Biomass production can have both positive and negative effects on species diversity. However, woodfuel production systems as well as agroforestry have the potential to increase biodiversity. A regional energy planning could have an important role to play in order to achieve energy-efficient and cost-efficient energy systems. Closing the loop through the optimization of all resources is essential to minimize conflicts in resource requirements as a result of increased biomass feedstock production. A systems approach where the agricultural, forestry, energy, and environmental sectors are considered as components of a single system, and environmental liabilities are used as recoverable resources for biomass feedstock production has the potential to significantly improve the economic, social, and environmental sustainability of biofuels. The LCA (life cycle analysis) approach takes into account all the input and output flows occurring in biomass production systems. The source of biomass has a big impact on LCA outcomes and there is a broad agreement in the scientific community that LCA is one of the best methodologies for the GHG balance calculation of biomass systems. Overall, maximizing benefits of bioenergy while minimizing negative impacts is most likely to occur in the presence of adequate knowledge and frameworks, such as for example certification systems, policy and guidelines. Criteria for achieving sustainability and best land use practices when producing biomass for energy must be established and adopted. ___________ ¹ Direct land-use change occurs when feedstock for biofuels purposes (e.g. soybean for biodiesel) displace a prior land-use (e.g. forest), thereby generating possible changes in the carbon stock of that land. ² Indirect land-use change (ILUC) occurs when pressure on agriculture due to the displacement of previous activity or use of the biomass induces land-use changes on other lands.
This study examines the changes of total organic carbon (TOC) concentrations in 20 Swedish lakes throughout Sweden using pre-industrial (1860) TOC0 inferred from near-infrared spectrometry (TOCNIRS) of lake sediments to determine if land use change over time could be a plausible explanation for changes in lake water TOC. The study also focuses on the importance of using inferred pre-industrial data of lake water pH and TOC for acidification assessment, in particular ANC0. Most lakes in this study show a long-term decreasing trend of TOC from 1860 up to -0.45 mg/l/yr-1 to an identified breaking point where the TOC turns from decreasing to increasing. Fifteen of the lakes have a breaking point in the mid to late 20th century (1950-1980) while five lakes do not display a clear breaking point. The magnitude of the increasing trend of TOC after the breaking point is up to 0.16 mg/l/yr-1 . Changes in land use were studied by comparing historical maps with present databases of land use. Land use changes in the catchment area show substantial differences in forest cultivation; for instance the coniferous forest has increased by 26% on average. This increase is due to removal of native forest (deciduous forest) and removal of wetlands. Two major conclusions can be drawn from the effects of land use change on TOC levels: (I) No direct correlation between land use change and long-term trends of TOC could be identified in this study. Previous studies have identified the effects of land use change on the carbon storage in the catchment area that corresponds well with the findings of this study. (II) the character of the forest land plays an important role when discussing the effects of land use change for long term TOC trends. The change from open-ended forests with large trees to intense managed forest is considered as an important driving force for TOC. To determine reference conditions there is a need to make good estimations of ANC0 for acidification assessment in Swedish lakes. This study examines the precision of MAGIC model ANC0 calculations (ANC0-MAGIC) against ANC0 calculated with TOCNIRS, diatom-pH and calculated pCO2 (ANC0, diatom-NIRS). ANC0, diatom-NIRS shows a mean difference of (-31µeq/l) when comparing it with ANC0-MAGIC. In comparison, when using contemporary TOC (TOCt) mean lake value 1990-2005 (ANC0,diatom-TOC) the results show a mean difference of (-0.45 µeq/l) in comparison with ANC0-MAGIC. A better fit is generated with TOCNIRS then TOCt. This could be an indication that ANC0- MAGIC overestimates the acidification of Swedish lakes. The European Union's "Water 8 Framework Directive", which Sweden has implemented, requires that all surface waters within the Union's authority have achieved good ecological status by 2015. According to the ecological quality standard the differences between the pre-industrial pH and contemporary pH, i.e. ΔpH=pH0-pHt, should not be more than 0.4 units. This study shows that the long-term trends have to be accounted for when calculating reference conditions and ecological status for acidification
This article brings together the concepts of land and landscape, tightly linked in urban transformative situations, but rarely used for the purpose to strengthen strategic planning for sustainability. They are investigated as a combined base for land use deliberations, in early phases of planning processes, in practices of different scale, especially in a European context, drawing on planning and landscape policies generally agreed upon, as well as the UN Sustainable Development Goals. This article argues for taking into consideration the landscape as experienced human habitat, in relation to the understanding of land as both a common resource, and as pieces of property. This is motivated partly by the more or less global political trend and the turn from state interventions to individualistic capitalism (calling for new methods to solve common challenges), but also by a changing planning profession, increased collaborative planning processes, increased significance of public space as a scarce resource in densified cities, the need for holistic perspectives in sustainable urban development and the need for unifying concepts for urban and rural land at a local and regional scale. A new concept "around-scape" is suggested, in order to make visible the subjective binding between available perceived resources and spatial transformation.
Public concern about pesticide use is very high, although it varies with social, ethical and political factors. In periurban regions, farmers live close to people with other occupations. Thus farming activities such as pesticide spraying may cause tensions. Pesticide use may also cause changes in pest abundances outside the treated field, on plants in neighbouring gardens. The first part of this thesis compared perceptions of pesticide use by farmers and their neighbours in two periurban regions in Sweden. Neighbours reported using pesticides, but perceived pesticide use to be more negative than farmers did. Neighbours also perceived themselves as pesticide non-users to a higher extent than farmers, although both categories used pesticides in their home setting to a similar extent. Perceptions of pesticide use differed between farmers and neighbours but also between groups of farmers, depending on farm size, whether pesticides were used or not, number of crops grown and pesticide safety knowledge. In two field studies, abundances of pests were compared in garden crops adjacent to insecticide-treated and untreated agricultural fields. The garden crops were not subjected to wind drift during insecticide spraying. Despite this, pest abundance and their damage on vegetables and ornamental flowers in nearby gardens decreased with insecticide use in the agricultural fields. The magnitude of this decrease depended on type of insect pests targeted, garden plants tested and timing of pesticide applications. In general, perceptions and attitudes concerning pesticide use differed between groups of people in the periurban society studied, e.g. with social factors such as gender, age and education. The fact that pesticide use in agricultural fields may actually benefit neighbouring garden crops is a novel finding. The findings presented here can be of use for policy makers to avoid conflicts regarding pesticide use in periurban environments, since it is important to address variations in the views of different groups of people in society and to communicate both the negative and positive effects of pesticide use.
Groundwater monitoring is recommended as a higher-tier option in the regulatory groundwater assessment of crop protection products in the European Union. However, to date little guidance has been provided on the study designs. The SETAC EMAG-Pest GW group (a mixture of regulatory, academic, and industry scientists) was created in 2015 to establish scientific recommendations for conducting such studies. This report provides recommendations for study designs and study procedures made by the Society of Environmental Toxicology and Chemistry (SETAC) Environmental Monitoring Advisory Group on Pesticides (EMAG-Pest). Because of the need to assess the vulnerability to leaching in both site selection and extrapolating study results, information on assessing vulnerability to leaching is also a major topic in this report. The design of groundwater monitoring studies must consider to which groundwater the groundwater quality standard is applicable and the associated spatial and temporal aspects of its application, the objective of the study, the properties of the active substance and its metabolites, and site characteristics. This limits the applicability of standardised study designs. The effect of the choice of groundwater to which the water quality guideline is applied on study design is illustrated and examples of actual study designs are presented.
Environmental organizations play an important role in mainstream debates on nature and in shaping our environments. At a time when environmental NGOs are turning to questions of gender-equality and ethnic diversity, we analyze their possibilities to do so. We argue that attempts at ethnic and cultural diversity in environmental organizations cannot be understood without insight into the conceptualizations of nature and the environment that underpin thinking within the organization. Serious attempts at diversity entail confronting some of the core values on nature-cultures driving the organization as well as understanding the dimensions of power such as class, gender, and race that structure its practices. We study what nature means for one such organization, the Swedish Society for Nature Conservation, and the ways in which thinking about nature dictates organizational practice and sets the boundaries of their work with diversity in their projects on outdoor recreation. We base our analysis on official documents and interviews, analyze how ''diversity'' and ''gender-equality'' are represented in the material and reflect on the interconnections as well as the different trajectories taken by the two issues. Our study shows that the organization's understanding of nature is a central and yet undiscussed determinant of their work with diversity that closes down as much as it opens up the space for greater inclusion of minorities. We argue that for environmental organizations wanting to diversity membership, a discussion of what nature means for people and their relationships to each other and nature is vital to any such efforts.
Sweden has recently decided to ratify the European Landscape Convention (ELC). Methods for implementation have been discussed for both the ELC and related national environmental objectives. Thus, the Swedish Government decided that seven County Administrative Boards should undertake pilot studies for Regional Landscape Strategies (RLS) during 2006–2007. The RLS pilot projects aimed at a new and more effective approach for conservation and sustainable land use at regional level. Additionally, RLS should also function as a method for implementing the ELC and other environmental objectives. One specific focus of the pilot studies was on developing methods for public participation. Other important issues were to involve different administrative sectors, municipalities and regional authorities in the process, as well as attaining a good balance between conservation and profitable land use. This chapter presents some of the results from the RLS case study in Vellinge municipality, Scania (Skåne), Sweden's southernmost province. The focus of the study was on public participation in particular by equestrians and landowners. The first 'bridleway organization' of its kind in Sweden was established as a direct result of the project.
Lithuania and Southern Sweden share similar natural conditions, but differ considerably in forest policies and management; thereby providing an opportune basis for comparative studies. Since the 1990s, Sweden has attempted to reduce the negative impact of its forest management on biodiversity, after decades of intensive production forestry. In contrast, Lithuania has been intensifying forestry practices associated with the post-soviet socio-economic transition. Here we assess the actual outcomes by comparing selected forest structure and composition variables known to be indicators for forest biodiversity; and estimate the prospective trends by scrutinising current forest policies and management. Our results indicate that Lithuanian forests consistently possessed higher rankings in six indices related to tree species composition, stand age, and deadwood quantities that are positively associated with forest biodiversity. The reverse is indicated by those data on stand age and tree diameter that are associated with centennial dynamics in forest utilisation intensity. With respect to policy instruments, Lithuania designates a substantially greater share of forest area to non-timber functions and legislates more severe management restrictions in forests targeting timber production. Concurrently, all estimates of forestry activities indicate more intensive forest management in Southern Sweden, including a higher share of artificial regeneration and shorter rotations. This allows concluding that, if current forest management practices persist, then an increased "biodiversity gap" may be expected between the two countries. The study concludes with discussing to what degree the identified trends are the direct product of targeted policies versus merely by-products of other factors.
Cirsium arvense (L.) Scop. is a troublesome weed, causing economic losses by reducing crop yield, increasing herbicide and tillage costs, and degrading soils due to increased tillage requirements. The major control method for C. arvense is herbicide application, but this poses socio-environmental and herbicide resistance risks. The European Union promotes reduced dependence and sustainable use of herbicides, combined with cultural and mechanical weed control. This thesis assessed the effects of integrated weed control on the population dynamics of C. arvense. For mechanical control, farmers are recommended to act when C. arvense is most sensitive to disturbance, i.e. at the point of minimum belowground weight, coinciding with 7-10 leaves per shoot. However, many farmers believe that this is too late. To estimate the compensation point (CP), defined as the minimum weight of the entire belowground structure of C. arvense, and identify links between initial root weight, planting depth and crop competition, three outdoor pot experiments were performed. For chemical control, farmers are recommended to spray when the majority of C. arvense shoots are 10-20 cm high. To assess the effects of timing and dose of herbicide application (MCPA), and crop competition on growth and development of C. arvense, one outdoor pot experiment and one field experiment were performed. The field experiment also assessed the effects of selective cutting. It was found that CP for C. arvense occurred before 3-leaf stage and that treatment effects were minor (<0.5 leaf stages). Depletion of planted root fragments ceased on average around leaf stage 3-4, indicating that CP occurs at early leaf stages. In the pot experiment, the strongest effect of herbicide treatment was obtained by spraying with the recommended dose in the presence of a crop when the largest C. arvense shoot had 3-4 leaves, corresponding to maximum height 13 cm and median height 6 cm. Crop competition reduced biomass, shoot height and leaf production of C. arvense regardless of herbicide dose. In the field experiment, herbicide treatment at 4-5 leaves or 8-10 leaves gave similar control effects as selective cutting. Herbicide application had a more immediate effect on growth and development of C. arvense while selective cutting depleted the below-ground structures more gradually. The results indicate that mechanical control of C. arvense should be performed earlier than previously recommended, probably before C. arvense reaches 3-4 leaves per shoot. Also early herbicide spraying seems to be as efficient as spraying later in the season.
The purpose of this paper is to investigate cost-effective climate policy instruments for bioenergy and timber, adapted to the impacts on interdependent forest carbon pools, and applied in the EU climate policy to 2050. We develop a discrete time dynamic model including forest carbon pools in biomass, soil, and products, as well as fossil fuel consumption. The analytical results show that the optimal taxes on forest products depend on the growth in the respective carbon pool. The application to the EU 2050 climate policy for emission trading shows that total costs for target achievement can be reduced by 33 percent if all carbon pools are included, and the carbon tax on fossil fuel can be reduced by 50 percent. Optimal taxes on forest products differ among countries and over time depending on the potential for increased carbon sequestration over the planning period. (C) 2017 The Authors. Published by Elsevier Ltd.
Because of population clustering, it is increasingly difficult for the rural poor to access land in Zambia. Such a clustered space is along the line-of-rail, where more people are looking to make use of land. Simultaneously, in a country where multiple political authorities can perform recognition of land, people also have to balance and navigate within this pluralistic political landscape to enjoy secure access and use of land. As such, property has the potential to improve security and create legitimacy to land. Within 100 yards along the railway, land is in administrative limbo due to the lack of effective control by its legal owner, the state. This thesis investigates the property production in land occupied by rural people along the railway in Southern Province, Zambia, through ethnographic and interview-based fieldwork. With a widened understanding of property that goes beyond juridical interpretations inseparable from law, I show how property making abandons formalised scripts, and instead is performed through contextual and localised orders. Occupants of land along the railway put labour and material investments into the land to reinforce legitimacy, both among each other as well as when facing political authority. With the state as formal owners of railway land, chiefs and headmen (i.e. customary authority) get squeezed by engaging in administering the land since it is outside of their legal jurisdiction. At the same time, state authority also administers and recognizes land, albeit implicitly, when maintenance workers survey the railway tracks. I conclude that these findings together create a whole greater than the sum of its parts of how property production can take place on land in limbo.
The paper argues that policies towards upland communities in Vietnam tend to reinforce land use strategies that increase vulnerability to climate-related risk and undermine adaptive capacity of upland communities. It is argued that the division of land use between intensive agriculture/tree plantation and protected forest is increasing both livelihood- and environmental risk. Qualitative interviews and group discussion with upland villagers and local government staff in two districts of north and central Vietnam suggest that farmers are facing frequent loss and damage due to floods, storms and drought. Changing production patterns, together with the increase in climate-related hazards and stresses, is changing the character of vulnerability of upland communities. The study primarily explores village-level perspectives regarding impacts of hazards and stresses, ideas of how to reduce risk, along with how related policies and institutions influence local possibilities of risk reduction and adaptation. Our fieldwork results suggest that many villagers and local leaders see adaptation and risk reduction in terms of improved irrigation and in terms of access to land and forests for their livelihoods. The findings support arguments for more integration of agriculture and forestry land use, allowing for more flexibility in the development of upland livelihoods, with the aim of facilitating adaptation to climate change.