17 research outputs found
A 300-year record of sedimentation in a small tilled catena in Hungary based on δ13C, δ15N, and C/N distribution
Purpose Soil erosion is one of the most serious hazards that endanger sustainable food production. Moreover, it has marked effects on soil organic carbon (SOC) with direct links to global warming. At the same time, soil organic matter (SOM) changes in composition and space could influence these processes. The aim of this study was to predict soil erosion and sedimentation volume and dynamics on a typical hilly cropland area of Hungary due to forest clearance in the early eighteenth century. Materials and methods Horizontal soil samples were taken along two parallel intensively cultivated complex convex-concave slopes from the eroded upper parts at mid-slope positions and from sedimentation in toe-slopes. Samples were measured for SOC, total nitrogen (TN) content, and SOMcompounds (δ13C, δ15N, and photometric indexes). They were compared to the horizons of an in situ non-eroded profile under continuous forest. On the depositional profile cores, soil depth prior to sedimentation was calculated by the determination of sediment thickness. Results and discussion Peaks of SOC in the sedimentation profiles indicated thicker initial profiles, while peaks in C/N ratio and δ13C distribution showed the original surface to be ~ 20 cm lower. Peaks of SOC were presumed to be the results of deposition of SOC-enriched soil from the upper slope transported by selective erosion of finer particles (silts and clays). Therefore, changes in δ13C values due to tillage and delivery would fingerprint the original surface much better under the sedimentation scenario than SOC content. Distribution of δ13C also suggests that the main sedimentation phase occurred immediately after forest clearance and before the start of intense cultivation with maize. Conclusions This highlights the role of relief in sheet erosion intensity compared to intensive cultivation. Patterns of δ13C indicate the original soil surface, even in profiles deposited as sediment centuries ago. The δ13C and C/N decrease in buried in situ profiles had the same tendency as recent forest soil, indicating constant SOM quality distribution after burial. Accordingly, microbiological activity, root uptake, and metabolism have not been effective enough to modify initial soil properties
Potential effects of land use change around the inner lake in Tihany, Hungary - Examination of geology, pedology and plant cover/land use interrelations
Land use changes are sources for a series of problems but they can be solutions as well. In a nature conservation area it can reduce and increase biodiversity, however in the Tihany Peninsula nature conservationists try to protect the present natural environment. Human induced landscape changes gained the peninsula the first landscape protection district status of the country. Geological background, microclimatic conditions, given soil heritage, plant cover and land use plays an important role in the life of the peninsula. We wish to give an example how human induced activities might affect the valuable natural environment in a way that threatens the aim of the protection
Development of appropriate indicators of the relationship between organic/low-input farming and biodiversity
Development of appropriate indicators of the relationship between organic/low-input farming and biodiversity
International collaboration for soil conservation teaching
This contribution summarizes the main activities carried out in two Erasmus Intensive Programmes involving five Universities from France, Hungary, Greece, Italy, Portugal, and Spain for six years. In each year a group of 25 students and 6 teachers participate for 15 days in different interactive teaching activities related to soil conservation. Different issues were taught and discussed in international collaboration. The main outputs of this collaboration teaching were interactive exercises and two handbooks.info:eu-repo/semantics/publishedVersio
Glossary on agricultural landscapes.
T
he following glossary of terms related to the European agricultural landscape shall serve as a common basis for all parties, working in or on agricultural landscapes. Some of the terms are quite common and sometimes used in our every day language, but they often have different meanings in particular countries. These differences may be a result of varying linguistic developments, history and traditions. The glossary contains 40 terms in seven languages; English, Dutch, Estonian, French, German, Hungarian, and Spanish. Each term begins with an English definition, illustrated by a photograph. If there are differences in meanings and connotations of single countries, they are mentioned in the designated country’s column. This work is to be continued
Wooded grasslands as part of the European agricultural heritage
Wooded grasslands have always played an important role in rural life with changing issues: They are of high importance for questions of biodiversity, soil, and water resources and in preserving agricultural heritage, but their maintenance is labor intensive. Abandoned wooded grasslands undergo succession, and food production alone does not support their survival. They require special attention and at the beginning a well-established subsidy system can help to contribute to their survival. Their sustainable use in the present-day landscapes can only be conceivable in complexity where food production, reintroduction of their cultural values, biodiversity and landscape protection, and ecotourism are playing an important role. This chapter gives an overview on the recent situation of wooded grasslands and their historical development, based on the work done by the Institute for Research on European Agricultural Landscapes (www.eucalandnetwork.eu). National pictures, definitions, history (including local names), threats, potentials, cultural values, spatial distributions, subtypes, and available databases have been collected, described, and analyzed. The main results of this survey are as follows: (1) Wooded grasslands are known to the public but mainly to local communities where they occur; (2) Many subtypes of wooded grasslands exist in various European countries; (3) Wooded grasslands underwent tremendous changes during the past centuries and lost their importance for various reasons; (4) There are many local and regional projects focusing on wooded grasslands, often as “lighthouse” projects to valorise cultural achievements