Semi-natural grasslands of the eastern Moravia have big potential to host species-rich plant communities. However, changes in land-use during the second half of the last century were rapid and vast and many grasslands had been ploughed over. In the early 80s some arable lands were sown with low diversity clover-grass mixture and transferred back to grassland. Restoration of grasslands on former arable fields is a major challenge. Their colonisation by grassland species may be complicated by initial seeding productive low diversity seed mixtures. The aim of this study was to estimate differences in species composition and species diversity between ex-arable artificially seeded grasslands and fragments of grasslands with continuity over 70 years in the north part of White Carpathian Mts., SE Czech Republic and identify species traits limiting species ability to colonize the ex-arable grasslands. Target plant species (total of 137) were surveyed on 66 grasslands. Surveyed grasslands were according to continuity and type of management. Coordinates of centroids from each polygon (i. e. surveyed grassland) were used to treat the spatial correlation of the surveyed grasslands. The effect of continuity on species composition and diversity was tested after accounting for differences in the management and...

The food production rate is required to increase in order to meet the ever-increasing world population. At the same time, this needs to be done in a sustainable manner as the agriculture sector today is responsible for a substantial part of the annual carbon dioxide emissions associated with human activities. In this study, eight farmers in the Swedish agricultural sector whose businesses are primarily based on cultivation and crop production, were interviewed. This to get an understanding of farmers ́ view on connectivity and data, and how this could enable a more productive and sustainable sector in the future.  The study has identified future scenarios that have the potential of contributing to a sustainable development of the sector which are enabled by data and a more connected agriculture sector. One scenario is about fleets of small, connected autonomous agricultural units enabling the electrification transformation of the sector. This will allow for small-scale farms focusing on quality to have great positive impact on the food supply and the sustainability development of the sector. A second scenario is to, with the help of data, make it easier to establish a true consumer value for sustainable products or those of good quality and thereby enable consumers to budget their environmental impact related to food from arable land. In order for this to become feasible a third scenario is related to the agricultural ecosystem which needs to come together and find solutions for data management, creating systems for data handling and analytics to be used both by the farmers and decision makers. With this in place a fourth scenario will be feasible where laws, regulations, and subsidies of today could transform from a generic approach into a more area-based system taking local conditions, determined by data, from individual farms into consideration. There are few contradictions between sustainability and profitability from a farmer ́s point of view and with the help of data and a more connected agriculture, the sector could develop in a positive direction and increase the food production in a sustainable manner. / Produktionen av livsmedel behöver öka för att möta den ständigt ökande världsbefolkningen. Samtidigt måste detta göras på ett hållbart sätt, eftersom jordbrukssektorn redan idag bidrar med en betydande del av de årliga koldioxidutsläppen från mänskliga aktiviteter. I den här studien intervjuades åtta jordbrukare i den svenska jordbrukssektorn med inriktning på odling och produktion av grödor. Detta för att få en förståelse för jordbrukarnas syn på uppkoppling och data, samt hur detta skulle möjliggöra en mer produktiv och hållbar sektor i framtiden.  Studien har identifierat några framtidsscenarier som har potential att bidra till en hållbar utveckling av sektorn och som möjliggörs av data och en mer kopplad jordbrukssektor. Ett scenario handlar om flottor av små, uppkopplade autonoma jordbruksenheter som i sin tur möjliggör en elektrifieringstransformation av sektorn. Detta gör det möjligt för småskaliga jordbruk med fokus på kvalitet att få stor positiv inverkan på livsmedelsförsörjningen och jordbrukssektorns hållbarhetsutveckling. Ett andra scenario är att med hjälp av data göra det lättare att skapa ett verkligt konsumentvärde för hållbara produkter eller produkter av god kvalitet och därigenom göra det möjligt för konsumenterna att budgetera sin miljöpåverkan relaterad till mat från åkermark. För att detta ska bli verklighet krävs ett tredje scenario som innebär att ekosystemet inom jordbrukssektorn måste komma samman och hitta lösningar för datahantering, skapa system för dataanvändning och analys som i sin tur blir användbar både av jordbrukare och beslutsfattare. Med detta på plats kommer ett fjärde scenario att vara genomförbart där dagens generiska lagar, regleringar och subventioner kan förvandlas till ett mer områdesbaserat system där direkt hänsyn kan tas till lokala förhållanden, baserat på data från enskilda gårdar. Det finns få motsättningar mellan hållbarhet och lönsamhet ur jordbrukarnas synvinkel och med hjälp av data och ett mer uppkopplat jordbruk kan sektorn utvecklas i en positiv riktning och öka livsmedelsproduktionen på ett hållbart sätt.

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La restauration écologique a été identifiée comme une approche permettant notamment de ralentir la perte de biodiversité et de maintenir tous les biens et services issus de cette biodiversité desquels dépend le bien être de notre civilisation actuelle. Cette restauration des écosystèmes se base sur des connaissances provenant à la fois de l'écologie des communautés et de l’écologie de la restauration. Les objectifs de la thèse sont donc de comprendre la dynamique d’une steppe méditerranéenne après changements d’usage ainsi que la mise en oeuvre de techniques qui pourraient être appliquées à la restauration de cet écosystème après une perturbation anthropique sévère. La thèse a pour objet d'étude la steppe méditerranéenne de la plaine de Crau, et notamment d’anciennes cultures pour étudier la recolonisation spontanée après perturbation et le projet de réhabilitation à grande échelle de Cossure pour les expérimentations sur les techniques de restauration. En ce qui concerne la dynamique après une perturbation anthropique exogène sévère, nous avons confirmé la faible résilience de la communauté végétale steppique à la fois à moyen (30-40 ans) et long terme (150 ans), tandis que les paramètres du sol et le taux d'infestation des mycorhizes sont résilients sur le long terme. En outre, nous avons confirmé le rôle joué par les trois filtres dans la recolonisation des communautés végétales. En ce qui concerne la steppe de la Crau, la recolonisation est déterminée en premier par le filtre abiotique, puis par le filtre de dispersion et enfin par le filtre biotique. Compte tenu de la faible résilience de la communauté, nous avons testé plusieurs techniques de restauration appliquées à grande échelle au sein du projet de réhabilitation de Cossure: le semis d’espèces nurses, l'étrépage de sol, le transfert de foin et le transfert de sol. Afin d'évaluer l'efficacité des techniques de restauration, nous avons développé des indices pour mesurer « l 'intégrité » de la structure de la communauté permettant de distinguer les abondances inférieures des abondances supérieures par rapport à la communauté de référence. Les meilleurs résultats ont été obtenus avec le transfert du sol, suivi par l’étrépage de sol, puis le semis d’espèces nurses et enfin le transfert de foin. Ces résultats ont toutefois confirmé la difficulté de restaurer totalement la communauté végétale steppique. Les recherches menées au sein de cette thèse montrent que les connaissances actuelles en matière de restauration écologique permettent de restaurer au moins partiellement certaines composantes de cet écosystème, mais suggèrent de mettre un maximum de moyens pour la conservation in situ des habitats naturels plutôt que de devoir les restaurer après qu'ils aient été détruits / Ecosystem restoration has been identified as one approach to slow down the loss of biodiversity and to protect all the biodiversity-based goods and services from which humankind benefits. Restoration feeds from knowledge coming from both community ecology and restoration ecology. The objectives of the thesis are to provide insights on both the dynamics of a mediterranean steppe after changes in land-use and the implementation of techniques which could be applied to restore this ecosystem after severe anthropogenic disturbances. The thesis takes as a study object the La Crau Mediterranean steppe, and especially former cultivated fields to study the recovery after cultivation and the Cossure large scale rehabilitation project to experiment rehabilitation and restoration techniques. Concerning dynamics after severe exogenous anthropogenic disturbances, we confirmed the low resilience of the steppe plant community both at mid- (30-40 years) and long-term (150 years) while the resilience of soil parameters and mycorrhizal infestation rate are effective on the long-term. Moreover we confirmed the role played by the three filters in the plant community recovery and found that for the La Crau steppe, this is firstly driven by the abiotic filter, then by the dispersion filter and finally by the biotic filter. Given this low resilience, we tested several restoration techniques applied at large-scale within the Cossure rehabilitation project: nurse species seeding, topsoil removal, hay transfer and soil transfer. In order to assess the efficiency of restoration techniques we developed indices to measure the community structure integrity, disentangling lower and higher abundances compared to the reference. The best results were obtained with soil transfer, followed by topsoil removal, then nurse species seeding and finally hay transfer. The research conducted for this thesis shows that current knowledge in ecological restoration makes it possible to restore at least partially some La Crau ecosystem components, but ought to lead us to understand the importance of in situ conservation of natural habitats as a better alternative to restore them after they were destroyed

The aim of the diploma thesis was to evaluate the content of soil organic carbon in the area of Novohradsko. Soil organic carbon was monitored in its stable (SOC) and labile (WSOC) form, followed by the total organic carbon stock (Cpool). These soil parameters were determined in soils of different land cover types (forest, arable land, grassland) in the area formed by the catchments of Pasecký, Bedřichovský, Váčkový and Veverský stream. Data obtained in 2001, 2007 and 2014 were statistically analysed and the comparison of the data from different catchments was conducted. The results show the impact of different land use on the amount of soil organic carbon. In general, a higher amount of soil organic carbon were found in soils of grassland and forest soils, whereas a lower amounts were found in arable land. The comparison and the time development analysis show that there is a trend of the increase in quantity of stable fraction of soil organic carbon in all categories of land cover over the whole monitored period. The opposite trend of a continuous decrease over the whole of the monitored period in all categories of land cover was observed in amounts of labile fraction of soil organic carbon. It can be said that there is an increase in the stock of a stable fraction of soil organic carbon due to lower losses of the labile fraction of soil organic carbon in forest soils, arable soils and soils of grassland.

In this dipoma is priced selected lend and administrative costs by pricing regulation and market price, which is performed by a professional estimate using the comparsion (comparative) method. A case study is considered prices of land in connection with changes in the landscape plan and implementation strategy for rural development. It was also evaluated the degree to which the emergence of zoning and development of services and facilities in rural areas affects the amount of land prices.

Stickstoffdüngung und Bodenbewirtschaftung sind die Hauptquellen für Treibhausgase aus Anbausystemen. Dennoch sind diese Maßnahmen in Ackerbaubetrieben unerlässlich. In Anbetracht der Notwendigkeit, rasch Maßnahmen gegen den Klimawandel zu ergreifen, ist es notwendig Minderungspotentiale und Kosten in diesen Betrieben zu ermitteln und vergleichen. Es wurden Fallstudien in den USA, in Brasilien und in Deutschland durchgeführt, wobei jeweils eine Kultur in jeder Region untersucht wurde. Wissenschaftliche Literatur und Fokusgruppen mit lokalen Experten wurden genutzt, um realistische Ergebnisse zu generieren, die den lokalen Kontext abbilden. Diese Arbeit zeigt, dass die Wirtschaftlichkeit der Minderungsstrategien von dem betrachteten Zeithorizont abhängt, der sich aus der Kohlenstoffdynamik im Boden ergibt. Kurzfristig bieten Strategien, die die Kohlenstoffbindung fördern, ein größeres Minderungspotenzial, was jedoch langfristig nicht zutrifft. Kurzfristig wurden in Brasilien und den USA die geringsten Minderungskosten durch die Optimierung der Stickstoffdüngung erreicht. Diese Kosten sind negativ, was bedeutet, dass die Anwendung dieser Strategien, nicht nur ihre Emissionen, sondern auch ihre Kosten senken würden. Weitere kosteneffiziente Strategien waren die Verringerung der Bodenbearbeitungsintensität und Zwischenfrüchte, die in allen Fällen mit vergleichbaren Minderungskosten durchführbar waren und die Kohlenstoffbindung fördern. Der Einsatz von Hemmstoffen schließlich, der in den USA und in Brasilien möglich war, hatte die höchsten Minderungskosten. Langfristig betrachtet stiegen die Minderungskosten von Strategien mit Kohlenstoffbindung an und waren ähnlich hoch oder höher als bei Strategien ohne Kohlenstoffbindung. Da in allen Fällen dieselbe Methodik angewandt wurde, sind die Ergebnisse vergleichbar. Darüber hinaus sind die Ergebnisse zwar spezifisch für den Kontext, in dem sie berechnet wurden, sie liefern jedoch Erkenntnisse für ähnliche Regionen. / Nitrogen fertilization and soil management are the main sources of greenhouse gases from cropping systems. Yet these operations are essential on arable farms. Considering the need to take quick action against climate change, it is necessary to understand which mitigation potentials and cost can be attained in these farms and how they compare. Case studies in the USA, Brazil and in Germany were conducted, assessing one crop in each region. Scientific literature and focus groups with local experts were used to generate realistic results which depict the local context. This thesis identified that the economics of the mitigation strategies depended on the time horizon considered, which results from the carbon dynamics in the soil. In the short term, strategies promoting carbon sequestration offer a larger mitigation potential, yet this is not valid in the long term. In the short term, the lowest mitigation costs were attained by optimizing the nitrogen rate, feasible in the USA and Brazil. These costs are indicated to be negative, implying that adopting the strategy would not only lower emissions, but also reduce their costs. The next most cost efficient strategies were the reduction of the tillage intensity and cover crops, which were feasible in all cases with comparable mitigation costs and promote carbon sequestration. Lastly, the adoption of inhibitors, feasible in the USA and in Brazil, had among the highest mitigation costs. Assuming the long term, the mitigation costs of strategies with carbon sequestration increased, becoming similar to or higher than strategies without carbon sequestration. By applying the same methodology in each case, the results are comparable. Moreover, while the findings are specific to the context in which they were calculated, they provide insights for similar regions.

No description available.

我國為配合加入WTO，紓緩日後大量農產品開放進口，對本土農地利用管理與農業生產所帶來的衝擊，政府乃大幅度修正農業發展條例（以下簡稱農發條例），以為因應。該條例及配套法案業於民國八十九年一月四日、六日及十三日經立法院三讀通過，並由總統於同年一月二十六日公布施行。本次農發條例之修正要點，在農地政策方面，主要側重於農地合理的利用、有效地管理與適當的釋出，其中最大的轉變在於調整為「放寬農地農有，落實農地農用」原則，不再限制農地移轉承受人之身份與資格，並有條件地許可農企業法人承受農地。這樣的變革，旨在建立更為開放競爭的耕地買賣市場，增進耕地的流動性，以利農業經營者取得耕地，調整農業經營結構，應值贊同。然而，條文內容有無疏漏不妥？仍有待深入檢討；條文原則性的規定能否落實？尚待相關法令的配合修訂，方能儘速建立合理農地利用、管理與釋出機制，以確保我國的農業發展。 　　緣此，本研究乃就農發條例之研修條文內容，深入探析農地政策與移轉規定之轉變，同時藉由實地調查（問卷調查與深度訪談）及拜訪農政等單位，以瞭解移轉制度變遷之實施現況及其對農業經營之影響程度，並訪察農業經營者之意向及博採各方之想法，據以確實地檢視現行農地移轉制度有關之爭議與問題，再提出研修現行條文、修訂行政命令及研議配合措施等改進意見，冀能有助於促進農地合理利用，並供後續法律修正、執行之參考。最後，再綜合本研究之成果，推衍以下結論： 　　一、調整農地農有制度係時勢潮流，農地農用管理機制應詳加落實。 　　二、實證調查發現，受訪者大抵認同目前農地移轉制度之變革規定，惟對促進農地流動及帶動農業升級助益不大。 　　三、引進農企業法人承受耕地之成效不彰，且牽涉法令繁多，亟待整合修訂。 　　四、制度規則未能公平提供誘因，且未能有效減低執行面之不確定性，應儘速檢討改進並確實執行之。 　　五、農民與農企業法人普遍欠缺對相關法令資訊的瞭解，應加強相關人員之專業訓練與宣傳輔導。 　　此外，在研究過程中，發現仍有相關課題有待未來後續研究，以促使農地更有效利用管理，並能確保農業永續發展，建議如下： 　　一、健全農企業法人承受耕地之管理制度。 　　二、建構重要農業區之區分與保護機制。 　　三、進一步研究農業產銷班與農地利用之關聯性。 / For joining WTO and moderating the impact of the import of agricultural products on agricultural lands use and, management and production, our government reacted by revising the Agricultural Development Act (ADA). The ADA has been revised by the Legislative Yuan on January 4 and promulgated by the Presidential Decree on January 26, 2000. The main point of the revision is to emphasis on reasonable farmland uses, effective management and adequate release of the land regulations in the agricultural policy. The main change is to adjust ADA’s principle from “the right to own and use farmland to be limited to the farmer” to “the release of the restriction on farmland transferee and realization of the substantial farmland uses.” The revision does no longer set a limit to the status and qualification of transferees and permits the transferable rights of agribusiness on some certain conditions. It is approved that the revision is to establish a more open and competitive arable land market, to improve the liquidity of arable lands, to facilitate the acquirement of arable lands for agribusiness, and to adjust the agricultural production structure. However, we should review the completeness and realization of the revised ADA after the promulgation in order to assure the agricultural development. 　　Therefore, the main purpose of this thesis is to probe into the change of the agricultural land policy and transfer regulation from the provisions of the revised ADA, examine the exercising of transfer system change and its influence on agricultural operation, investigate the intention of agricultural managers for reviewing the relative debates and issues, and then offer some advice as references of revision in the future. The conclusion is described as follows: 　　1.It is a trend of the times to adjust the transfer system that the right to own and use farmland is limited to the farmer, and the mechanism of assuring the substantial farmland uses should be realized. 　　2.From empirical research, the interviewees almost agree to the new agricultural land transfer system, but think that it is not useful for accelerating the liquidity and promoting the level of agricultural industry. 　　3.It is not significant on introducing agribusiness to be the transferee of arable lands, and it is necessary for our government to integrate too many relative and complicated laws. 　　4.We should review and implement the revised ADA because the rules themselves cannot provide fair incentives and effectively reduce the uncertainty from exercising it. 　　5.Farmers and agribusinesses lack the knowledge of relative laws, so the government should enhance them the professional training and give them consultant service. 　　In addition, from this research, we also found that some issues need to be studied for effective management of agricultural lands and sustainable development of agricultural industry in the future. 　　1.How to sound the management institution when agribusinesses want to be the transferee of arable lands. 　　2.How to designate important agricultural zones and establish protection mechanism. 　　3.Study the correlation between the agricultural product marketing class and agricultural land uses.

No description available.