Competitiveness of Portuguese Montado Ewe Production Systems among the European Ewe Production Systems

Maria de Belém Costa Freitas 1,* , Maria Raquel Ventura-Lucas 2, Lola Izquierdo 3 and Claus Deblitz 4 1 MED—Mediterranean Institute for Agriculture, Environment and Development, Universidade do Algarve, Faculdade de Ciências e Tecnologia, Campus de Gambelas, Edf. 8, 8005-139 Faro, Portugal 2 CEFAGE—Centre For Advanced Studies in Management and Economics, Universidade de Évora, Departamento de Gestão, Largo dos Colegiais, 2, 7000 Évora, Portugal; mrlucas@uevora.pt 3 Agralys GbR, Meistersingerstr. 18, 14471 Potsdam, Germany; lola.izquierdo@agralys.de 4 Thünen Institute of Farm Economics, Bundesallee 50, 38116 Braunschweig, Germany; claus.deblitz@thuenen.de * Correspondence: mbfreitas@ualg.pt


Introduction
Ewe production in Portugal has changed a lot in the last 20 years. Its numbers have consistently increased from Portugal's entry into the EU in 1989 until 1998, from 3547 to 3590 thousand animals [1]. However, from 1998 until 2018, the percentage of sheep has decreased almost 40%, reaching 2208 thousand animals by the end of this period. This decrease is felt in all Portuguese regions but is particularly noticeable in the south of the country. The Alentejo region concentrates 55% to 60% of the total sheep production and had a decrease from 1883 to 1305 thousand animals during this period, which means that in this region were lost around 42% of the animals lost [2].
Even though we can find some milk ewe production systems in Alentejo, the region's prime production is meat [2]. The meat is raised in an extensive agro-silvo-pastoral system known as Montado, The objective of this paper is to analyze the ewe production systems in the Montado, using the agri benchmark database, and compare these systems with other European countries' systems, ranking their competitiveness and efficiency among other systems in the European Union.
The paper is structured in five sections. Beside this Introduction, the Material and Methods present the main concepts underlying the agri benchmark network and make a brief presentation of the EU ewe farms considered in this network. The Results section presents the results of the applied methodology to the network ewe farms. During the Discussion section the results obtained are discussed, as well as the reasons behind them. The Conclusions section withdraws the main conclusion of this method application and suggestions are provided.

Material and Methods
As no previous research had been carried on to assess the competitiveness of sheep production in the Montado silvo-pastoral agro-ecosystem among other European Union sheep production systems, this study was exploratory in nature and was conducted to have a better understanding of the existing phenomenon [14]. In addition, this is a research that allows answering an unknown problem precisely enough [15].
The method of collection, analysis, and data interpretation in our study was based on secondary information. This systematic method with procedural and evaluative steps, in our study included two steps. The first step involved past data collection, embracing literature review and statistical data, accessible via various online and offline resources. This step aimed to specify how these past data contribute to our current research. The second step was focused on the agri benchmark database and its data availability and analysis methodology.
Agri benchmark is a global, non-profit network of agricultural economists, advisors, producers and specialists in key sectors of agricultural and horticultural value chains. It uses internationally standardized methods to analyze farms, production systems, and their profitability. The farm-level knowledge provided by partners world-wide is combined with an analysis of international commodity markets and value chains. This allows the provision of scientifically consistent and soundly based answers on strategic issues to decision-makers in policy, agriculture and agribusiness [16].
The Portuguese ewe farms presented in the agri benchmark database are Montado farms. The agri benchmark database includes typical farms, which are defined as [17]: (1) being an existing farm or a data set describing a farm; (2) being in a specific region which represents a major share of output for the product considered; (3) running the prevailing production system for the product considered; (4) reflecting the prevailing combination of enterprises as well as land and capital resources; and, (5) reflecting the prevailing type of labor organization.
As averages do not provide consistent production system data sets, the typical farms are not averages but rather the result of a panel meeting with four to six farmers and an advisor, where each figure is obtained in a consensus and/or based on individual farms which were 'typified' by replacing farm individual particularities by prevailing characteristics, figures, technologies, and procedures [18].
The EU ewe farms in the database are presented in Figure 1. We still use the UK ewe farms for the comparison because the data that we have until this moment corresponds to farms that follow the CAP guidelines as EU farms. The data presented in the figures refers to the year 2018.
As shown in Table 1, the feeding system in all typologies of enterprises in Portugal is based on grazing (PT_600 and PT_700). The first of these farms (PT_600) will be referred, from now on, as the bigger farm, since it represents a more extensive system based in a big extension of land. In opposition, the other farm (PT_700) will be referred as the smaller farm. In Spain ewe enterprises, the feeding system is based on grains, concentrates, and forages (ES_600, ES_800, ES_900, ES_1400, ES_2650). French ewe enterprises have different feeding systems, based on grazing (FR_460, FR_860) or based on grains, concentrates and forages (FR_470, FR_500, FR_750). In Germany, the feeding systems of ewe enterprises are based on grazing (DE_500, DE_1000) as well as in Ireland (IE_230, IE_300) and UK (UK_500, UK_700). As shown in Table 1, the feeding system in all typologies of enterprises in Portugal is based on grazing (PT_600 and PT_700). The first of these farms (PT_600) will be referred, from now on, as the bigger farm, since it represents a more extensive system based in a big extension of land. In opposition, the other farm (PT_700) will be referred as the smaller farm. In Spain ewe enterprises, the feeding system is based on grains, concentrates, and forages (ES_600, ES_800, ES_900, ES_1400, ES_2650). French ewe enterprises have different feeding systems, based on grazing (FR_460, FR_860) or based on grains, concentrates and forages (FR_470, FR_500, FR_750). In Germany, the feeding systems of ewe enterprises are based on grazing (DE_500, DE_1000) as well as in Ireland (IE_230, IE_300) and UK (UK_500, UK_700).  The competitiveness of these systems will be assessed using standard economic indicators, both on the structure of the farm (whole farm figures) and on the economic viability of the productions (enterprise figures).

Enterprise figures
The efficiency of the production and the resources' use will be assessed using standard indicators that compare production efficiency regardless of mother's weight or race: • Weaned lambs per 100 ewes and year. • Total LW sold per ewe and per kg of breeding ewe.
The economic indicator chosen, which can be expressed per animal, per ha and per 100 kg live weight sold, is:

•
Total cost by factor and non-factor costs.
Productivity figures are: • Economic labor productivity. • Physical labor productivity.

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Cash and non-cash costs, returns, and profitability.

•
Profitability with variations in opportunity costs.

Whole Farm Analysis
The return structure of the ewe farms analyzed shows that the majority of these farms assure their returns only from the ewe enterprise ( Figure 2). There are four farms (22,2% of the sample) that have a small share of income coming from cash crops. Another four farms combine the ewe production with other animal production activities. In this case, only one of these farms (IE_230) obtains the majority of returns (68%) from ewe production, while the other three farms (IE_300, UK_500 and PT_600) complement the ewe production with other activities that assure the biggest part of their income.

Whole Farm Analysis
The return structure of the ewe farms analyzed shows that the majority of these farms assure their returns only from the ewe enterprise ( Figure 2). There are four farms (22,2% of the sample) that have a small share of income coming from cash crops. Another four farms combine the ewe production with other animal production activities. In this case, only one of these farms (IE_230) obtains the majority of returns (68%) from ewe production, while the other three farms (IE_300, UK_500 and PT_600) complement the ewe production with other activities that assure the biggest part of their income. The composition of whole farm returns ( Figure 3) indicates that in EU and UK ewe production, an important share of farm returns comes from coupled and decoupled payments. Nevertheless, 83% of the farms market returns represent 50% or more of whole farm returns. Figure 3 also shows that in ewe production, most of the countries analyzed still have coupled payments, although in the majority of these farms (78%) they represent 15% or less of total returns. Additionally, most of these coupled payments are not coupled with ewe production. In fact, only in one case (ES_2650) the coupled payments linked with ewe represent more than 15% of whole farm returns. This farm has Cow-calf Beef finishing Cash crops Ewe The composition of whole farm returns ( Figure 3) indicates that in EU and UK ewe production, an important share of farm returns comes from coupled and decoupled payments. Nevertheless, Agriculture 2020, 10, 184 6 of 14 83% of the farms market returns represent 50% or more of whole farm returns. Figure 3 also shows that in ewe production, most of the countries analyzed still have coupled payments, although in the majority of these farms (78%) they represent 15% or less of total returns. Additionally, most of these coupled payments are not coupled with ewe production. In fact, only in one case (ES_2650) the coupled payments linked with ewe represent more than 15% of whole farm returns. This farm has no land and thus receives a special coupled ewe payment for farms without any land, that compensates for the fact that they do not have any right for decoupled farm payment. In the case of Portuguese farms, most of the returns not coming from the market come from decoupled payments. Coupled payments represent 21% of whole farm returns for the bigger Portuguese farm (PT_600) and 8% for the smaller one (PT_700), assuring that production decisions and resources' allocation have a linkage with market prices and competitive advantages of the farms. The composition of whole farm returns ( Figure 3) indicates that in EU and UK ewe production, an important share of farm returns comes from coupled and decoupled payments. Nevertheless, 83% of the farms market returns represent 50% or more of whole farm returns. Figure 3 also shows that in ewe production, most of the countries analyzed still have coupled payments, although in the majority of these farms (78%) they represent 15% or less of total returns. Additionally, most of these coupled payments are not coupled with ewe production. In fact, only in one case (ES_2650) the coupled payments linked with ewe represent more than 15% of whole farm returns. This farm has no land and thus receives a special coupled ewe payment for farms without any land, that compensates for the fact that they do not have any right for decoupled farm payment. In the case of Portuguese farms, most of the returns not coming from the market come from decoupled payments. Coupled payments represent 21% of whole farm returns for the bigger Portuguese farm (PT_600) and 8% for the smaller one (PT_700), assuring that production decisions and resources' allocation have a linkage with market prices and competitive advantages of the farms.   Figure 4 shows, in percentage, the detailed cost structure of these farms. Due to the fact that half of the farms only use family labor and in six of them the land rents paid cover less than 50% of the land value it is necessary to consider the opportunity cost of land and labor as well, in order to allow for the comparison of competitiveness between farms.   Figure 4 shows, in percentage, the detailed cost structure of these farms. Due to the fact that half of the farms only use family labor and in six of them the land rents paid cover less than 50% of the land value it is necessary to consider the opportunity cost of land and labor as well, in order to allow for the comparison of competitiveness between farms. Solely one third of these farms have labor representing less than 25% of the costs. Depreciation, which could indicate a more capital-intensive technology, shows that in these farms the use of capital is still low, as it rises to 16% of the whole farm costs in one case, but is under 10% in 56% of the farms. It is also remarkable that these farms are very "capital independent", since the interest paid is very low, in all cases. Both Portuguese farms have labor costs that represent less than 25% of whole farm costs but still have a very low % of depreciation on whole farm costs, indicating that their technological intensification pattern is still low.
The whole farm profitability identifies the various components of the farm's profitability, comparing the costs with the market returns and the coupled and decoupled payments ( Figure 5).   Solely one third of these farms have labor representing less than 25% of the costs. Depreciation, which could indicate a more capital-intensive technology, shows that in these farms the use of capital is still low, as it rises to 16% of the whole farm costs in one case, but is under 10% in 56% of the farms. It is also remarkable that these farms are very "capital independent", since the interest paid is very low, Agriculture 2020, 10, 184 7 of 14 in all cases. Both Portuguese farms have labor costs that represent less than 25% of whole farm costs but still have a very low % of depreciation on whole farm costs, indicating that their technological intensification pattern is still low.
The whole farm profitability identifies the various components of the farm's profitability, comparing the costs with the market returns and the coupled and decoupled payments ( Figure 5). This gives us a detailed picture of the market competitiveness of these farms and on the importance of coupled and decoupled payments. Only five farms, representing 27% of this sample (ES_1400, FR_470, IE_230, IE_300, and UK_700), pay their costs only with market returns. This means that all over EU (and UK), ewe farmers rely on coupled and decoupled payments to maintain their activity.
We can also observe in this figure that those farms that have percentages of coupled payments above 25% (DE_500, DE_1000 and ES_ 2650) are also, as expected, those that are less dependent on market price on their decisions (as market price is far from covering the total cost from the Profit and Loss account). For the Portuguese farms market returns represent 85% (PT_600) and 79% (PT_700) of the total costs from the Profit and Loss account, which tells us that on these farms the decision-making is still dependent on market returns.

Enterprise Analysis
The competitiveness of the systems has a strong link with their production efficiency. The efficiency on resources' use is a proxy for the systems' competitiveness and the increase in efficiency is an important indicator of the actual and future competitiveness of a product.

Production Efficiency
Even with different breeds and different weights, the weaned lambs per 100 ewes and year compare to the different production systems' efficiency. For the ewe farms in EU and UK, we can observe on Figure 6 that 61% of the farms analyzed produce 120 or more lambs per 100 ewes and year. In this group, one of the Portuguese farms stands out, with 143 lambs per ewe and year. We have five farms (representing 28% of the farms) that produce 5% under this limit, i.e., 114 lambs per ewe and year-the other Portuguese farm belong to this group. Finally, there are two French farms (FR_860 and FR_460) that are less productive-112 and 97 lambs per 100 ewes and year, respectively.   Figure 5. Whole farm profitability (1000 €/farm). Source: model results.

Enterprise Analysis
The competitiveness of the systems has a strong link with their production efficiency. The efficiency on resources' use is a proxy for the systems' competitiveness and the increase in efficiency is an important indicator of the actual and future competitiveness of a product.

Production Efficiency
Even with different breeds and different weights, the weaned lambs per 100 ewes and year compare to the different production systems' efficiency. For the ewe farms in EU and UK, we can observe on Figure 6 that 61% of the farms analyzed produce 120 or more lambs per 100 ewes and year. In this group, one of the Portuguese farms stands out, with 143 lambs per ewe and year. We have five farms (representing 28% of the farms) that produce 5% under this limit, i.e., 114 lambs per ewe and year-the other Portuguese farm belong to this group. Finally, there are two French farms (FR_860 and FR_460) that are less productive-112 and 97 lambs per 100 ewes and year, respectively. observe on Figure 6 that 61% of the farms analyzed produce 120 or more lambs per 100 ewes and year. In this group, one of the Portuguese farms stands out, with 143 lambs per ewe and year. We have five farms (representing 28% of the farms) that produce 5% under this limit, i.e., 114 lambs per ewe and year-the other Portuguese farm belong to this group. Finally, there are two French farms (FR_860 and FR_460) that are less productive-112 and 97 lambs per 100 ewes and year, respectively. Another important indicator of the production efficiency is the total LW sold, per ewe and per kg of breeding ewe. We can see in Figure 7 that the two Portuguese farms have very different behavior concerning the total LW sold per ewe (kg). The smaller and ewe's specialized farm producing heavier crossbred lambs manages to be between the 25% more productive farms. Nevertheless, both Portuguese farms are the most efficient in what concerns the total LW sold per kg of breeding ewe. Another important indicator of the production efficiency is the total LW sold, per ewe and per kg of breeding ewe. We can see in Figure 7 that the two Portuguese farms have very different behavior concerning the total LW sold per ewe (kg). The smaller and ewe's specialized farm producing heavier crossbred lambs manages to be between the 25% more productive farms. Nevertheless, both Portuguese farms are the most efficient in what concerns the total LW sold per kg of breeding ewe.  Figure 4 has already shown that ewe production farms are not capital intensive. Figure 8 shows the cost by factor and non-factor costs, expressed as €/100 kg LW sold. The PT_600 is, from this point of view, one of the least efficient enterprises, which is certainly due to the low weights of the breed. Nonetheless, we can corroborate the above observation about capital intensity: all the farms have low levels of capital cost per 100 kg LW.    Figure 4 has already shown that ewe production farms are not capital intensive. Figure 8 shows the cost by factor and non-factor costs, expressed as €/100 kg LW sold. The PT_600 is, from this point of view, one of the least efficient enterprises, which is certainly due to the low weights of the breed. Nonetheless, we can corroborate the above observation about capital intensity: all the farms have low levels of capital cost per 100 kg LW. Figure 4 has already shown that ewe production farms are not capital intensive. Figure 8 shows the cost by factor and non-factor costs, expressed as €/100 kg LW sold. The PT_600 is, from this point of view, one of the least efficient enterprises, which is certainly due to the low weights of the breed. Nonetheless, we can corroborate the above observation about capital intensity: all the farms have low levels of capital cost per 100 kg LW. The following figures detail the efficiency of land, labor, and capital use. Figure 9 shows the economic labor productivity, measured in € returns/€ labor costs, which is an important measure of efficiency.   The following figures detail the efficiency of land, labor, and capital use. Figure 9 shows the economic labor productivity, measured in € returns/€ labor costs, which is an important measure of efficiency. It can be seen that the smaller Portuguese farm have the best economic labor productivity-the extensive system, producing heavy crossbreed lambs, and using a low economic input of labor is very efficient. Nonetheless, the bigger Portuguese farm belongs to the 50% more efficient farms, reinforcing that the extensiveness does not mean a less efficient economic labor use. As expected, due to the extensive Montado system, the same does not hold for the physical productivity of labor, which, for this farm, is the lowest among all farms ( Figure 10).  Figure 11 shows the cash and non-cash costs, returns, and profitability to the EU and UK ewe   It can be seen that the smaller Portuguese farm have the best economic labor productivity-the extensive system, producing heavy crossbreed lambs, and using a low economic input of labor is very efficient. Nonetheless, the bigger Portuguese farm belongs to the 50% more efficient farms, reinforcing that the extensiveness does not mean a less efficient economic labor use. As expected, due to the extensive Montado system, the same does not hold for the physical productivity of labor, which, for this farm, is the lowest among all farms ( Figure 10).

Resources' Use Efficiency
It can be seen that the smaller Portuguese farm have the best economic labor productivity-the extensive system, producing heavy crossbreed lambs, and using a low economic input of labor is very efficient. Nonetheless, the bigger Portuguese farm belongs to the 50% more efficient farms, reinforcing that the extensiveness does not mean a less efficient economic labor use. As expected, due to the extensive Montado system, the same does not hold for the physical productivity of labor, which, for this farm, is the lowest among all farms ( Figure 10).  Figure 11 shows the cash and non-cash costs, returns, and profitability to the EU and UK ewe systems. The analysis of this figure points out to the long-term sustainability of the systems.
Only the bigger Spanish farm (ES_2650) pays depreciation and the total opportunity costs with the total returns. Only two farms (DE_500 and ES_800) do not cover the cash costs with their returns, making their ewe production not viable even in the short term. All the remaining farms pay cash costs and at least part of depreciation with their returns.  Figure 11 shows the cash and non-cash costs, returns, and profitability to the EU and UK ewe systems. The analysis of this figure points out to the long-term sustainability of the systems. Portuguese farms show very different situations: the smaller farm (PT_700) only pays the cash costs and part of depreciation. Nevertheless, as depreciation and opportunity costs are very small in this farm, which does not own land or family work, the returns pay 95% of all costs. The bigger Portuguese farm pays cash costs, depreciation, and part of the opportunity costs, which mainly come from land. On Figure 12, we can observe the profitability with variations on opportunity costs. It is clear that for PT_600, not considering the opportunity cost of land will considerably improve the farms' profitability.  DE_1000  ES_600  ES_800  ES_900  ES_1400  ES_2650  FR_460  FR_470  FR_500  FR_750  FR_860  IE_230  IE_300  UK_500  UK_700  PT_600   Only the bigger Spanish farm (ES_2650) pays depreciation and the total opportunity costs with the total returns. Only two farms (DE_500 and ES_800) do not cover the cash costs with their returns, making their ewe production not viable even in the short term. All the remaining farms pay cash costs and at least part of depreciation with their returns.
Portuguese farms show very different situations: the smaller farm (PT_700) only pays the cash costs and part of depreciation. Nevertheless, as depreciation and opportunity costs are very small in this farm, which does not own land or family work, the returns pay 95% of all costs. The bigger Portuguese farm pays cash costs, depreciation, and part of the opportunity costs, which mainly come from land. On Figure 12, we can observe the profitability with variations on opportunity costs. It is clear that for PT_600, not considering the opportunity cost of land will considerably improve the farms' profitability. costs and part of depreciation. Nevertheless, as depreciation and opportunity costs are very small in this farm, which does not own land or family work, the returns pay 95% of all costs. The bigger Portuguese farm pays cash costs, depreciation, and part of the opportunity costs, which mainly come from land. On Figure 12, we can observe the profitability with variations on opportunity costs. It is clear that for PT_600, not considering the opportunity cost of land will considerably improve the farms' profitability.

Discussion
Typically, the Montado silvo-pastoral agro-ecosystem is related to low intensity, low inputs, and high structural diversity [19]. In this grazed Mediterranean open woodland, acorn and seminatural vegetation are the alimentary basis of the sheep, Iberian pigs, and cattle explored in these livestock farming systems [20].
Ewe production systems in the Montado area have two different orientations: specialized ewe production farms; or complementary ewes to cow-calf production assuring the most efficient use of pasture and a risk diversification. In both cases the competitiveness of the system is important.

Discussion
Typically, the Montado silvo-pastoral agro-ecosystem is related to low intensity, low inputs, and high structural diversity [19]. In this grazed Mediterranean open woodland, acorn and semi-natural vegetation are the alimentary basis of the sheep, Iberian pigs, and cattle explored in these livestock farming systems [20].
Ewe production systems in the Montado area have two different orientations: specialized ewe production farms; or complementary ewes to cow-calf production assuring the most efficient use of pasture and a risk diversification. In both cases the competitiveness of the system is important. However, when ewes complement cow-calf, the farm economic returns are mainly from cow-calf instead of ewes. Cattle production means higher returns, though they are more demanding in terms of fodder intake and have greater impacts on the soil and trees' roots [19]. According to these authors, sheep are less demanding in fodder and have a lesser impact on the soil. Indeed, sheep are better adapted to an extensive governance model which relies on grazing in natural pastures, thus requiring very little investment in pasture improvement or fodder production [19].
The Portuguese ewe typical farms on agri benchmark are managed extensively, with very low levels of capital input. The use of labour is low and although its physical productivity is poor, particularly in the most extensive farms, the economic efficiency of labour is very good in both cases.
For both systems, most of the returns that do not come from the market come from decoupled payments. The market returns and decoupled payments assure 92% of farm returns for the ewe specialized farm, and 79% for the farm combining suckler cows and ewes. The discussion about competitiveness must not ignore government payments that assure the human presence in the man-made ecosystem of the Montado. Concerning competitiveness, the main question is whether or not the resulting structure assures that decision-making is linked to market prices and competitive advantages of ewe production, which is clearly the case. Thus, it is important that market values sheep products.
Sheep production has to increase certified products (per example, biological production, for which the Alentejo region has the biggest share in the country) especially if it is to reach external markets. The non-differentiation of sheep products induces several constraints in per capita consumption and imports. Producers should invest in this approach so that the productions can increase not just in number but also in market dimension. Better assistance to producers and an increase in their levels of schooling is necessary so that there will be more innovation and more productivity.
Additionally, Pinto Correia and Breman [21] stated that the diversification to other income sources, such as hunting or green/environmental tourism, is most likely a good option for the future of these farms. This diversification will improve the balance between costs from Profit and Loss, account, and returns.
Nevertheless, there is a great need to support producer's sustainability, reducing the gap between producer prices and transformation/distribution prices. In addition, the increase of short chains and the creation of partnerships with local restaurants, where producers can sell their products directly without needing transformation or distribution channels. Such can be appealing to new consumers and increase the willingness to pay for the product.
The Montado systems are classified as extensive systems, mostly meaning an extensive use of land. Our results show that ewe Montado systems are also not capital intensive. Labor seem to remain an important resource, which is also true in most of the EU and UK production systems. Albeit to a lesser degree than in the past, the Montado systems are still dependent on work, especially the most extensive ones, as capital resources are mostly linked with fences, feeders and other livestock handling equipment. Such emphasizes the social importance of the Montado in rural areas.
With this background, it is important to analyze the production efficiency of these systems among EU and UK ewe production systems.
The Portuguese ewe specialized farm is one of the most efficient farms analyzed when concerning the weaned lambs per 100 ewes a year. In fact, it belongs to the top 22% more productive farms in the sample. This result is most likely a consequence of the crossbreed choice that profits from a more productive breed on crosses.
The efficiency measured through the total LW sold per kg of breeding ewe also showed that Portuguese farms are the most efficient. This can be seen as a proxy for the current and future competitiveness of this production.
In what concerns cash and non-cash costs, returns, and profitability, it is possible to state that for the smaller Portuguese farm (PT_700) an increase on productivity or a reduction on cash costs would easily assure the long term economic sustainability of this farm, for which the returns pay already 95% of all costs. Nevertheless, managers have to be aware of the rationale behind every investment, so that those investments likely to raise fixed costs can be kept as low as possible. For the bigger Portuguese farm, returns pay cash costs, depreciation, and part of the opportunity costs that come from land. It can be argued that this farm could improve its long-term economic sustainability by a) improving the total LW sold per ewe that, as seen in Figure 6, is low or by b) reducing the cash costs per kg of LW sold. However, the true question that should be raised is whether there is an opportunity for this land outside the system. The profitability with variations on opportunity costs shows clearly that, in this case, not considering the opportunity cost of land will considerably improve the farms' profitability, meaning that in the long term the system is only profitable for landowners that have no other alternatives for land. The eco-labels and the geographic indications of origin can be one of the most suitable and profitable options for the ewe systems context in future [22]. Like many other sectors, sheep production depends on several factors, both internal and external, and has many challenges ahead. Pinto Correia and Godinho [5] stated that, when talking about preservation of the system or landscape, the question lies in which future pathways the land managers take. In addition, these traditional systems centered on one dominant tree species may be at risk under changing climatic conditions [23]. So, we believe that the bigger challenge is dealing with a new green economy, with probable new functions and new opportunities for land. Will the land management take ownership of new functions that may support high environmental quality and be a source of economic returns, but depend on the existence of the agro-silvo-pastoral system? Or, particularly in the bigger and more extensive farms, will new needs within the bioeconomy create new opportunities for land, and therefore pressure these systems' maintenance?

Conclusions
The objective of this paper was to analyze the ewe production systems in the Montado, using the agri benchmark database and quantitative standard analysis methodology, and compare these systems with other European countries' systems, ranking their competitiveness and efficiency among other systems in the European Union. We concluded that this methodology facilitated an in-depth understanding not only of the competitiveness and efficiency of ewe production systems in Portugal but also of their positioning regarding other systems in the European Union.
A green economy is one that provides economic opportunities and improved human well-being as well as sustainable management of natural resources, with multiple forms of locally specific green-economy activity. If the key principle of the green economy is about seeking economic opportunities from socially and environmentally sustainable practices, the ewe production systems analyzed follow this principle. However, making the transition to the green economy in rural areas requires political will, technological developments, and encouragement from market pressures. In practice, transition is likely to take place through a sequence of progressive steps.
Emerging from the study is the fact that, on the one side, farms are competitive because they are depending on the market for their decisions and, on the other side, that the diversification to other income sources would be a good option for the future sustainability of these farms. Thus, one recommendation is that the impact of market changes in decision-making process and consequently in competitiveness of sheep production systems should be examined. Other suggestions for future research is to study the impact of diversification alternatives in order to improve the balance between cost and returns and/or in the pattern of returns and the sheep production systems competitive position.