Objective The objectives of the project are: to study, in detail, the temporal and spatial distribution and structure of root systems and their mycorrhizas in different agriforestry systems throughout the European Community; to study water balance and nutrient cycling and partitioning between different components of agriforestry systems; and, by combining these data, to construct a conceptual and quantitative model to improve our understanding of how different agriforestry systems function and their likely ecological effects in different Community states in order to identify the conditions required for the development of sustainable multicrop land use systems. The work programme will include an agreed set of measurements to be carried out at both established and new sites. These will include: measurements of the quantities of nitrogen and phosphorous held in understorey, trees and soil at different times of the year; and measurements of the amount and chemical composition of incoming precipitation and a water balance for each site. These studies will involve the use of automatic weather stations and, at most sites, either a neutron probe or TDR. However, experience has shown that, because of the high stone and gravel content of Greek soils, moisture resistance blocks are more effective in those sites. (c)Nutrient losses to groundwater will be assessed using suction lysimeters, calibrated using drainage measurements made on selected sites. (d)The influence of treatments on soil structure e.g. bulk density organic carbon content, aggregate stability. (e)Root system and mycorrhizal activity are critical to the ability of the whole system to conserve nutrients. These factors will be studied in detail using (a) newly developed mini-rhizotron technology which allows root growth to be measured in situ and non-destructively using a miniature high resolution TV camera - computer facilities are used to digitise and analyse the data recorded and (b) analysis of root cores. The limited information that exists in literature together with results from the field trials, as they become available, will be used to develop one or more computer simulation models that can be used to improve our understanding of how these complex systems function. These models will also be useful in prddicting the likely impact on the environment and the biological systainability of agriforestry systems combining aspects of forestry, agriculture and animal husbandry across a range of potential sites within the Community. Fields of science engineering and technologyelectrical engineering, electronic engineering, information engineeringelectronic engineeringsensorsoptical sensorsagricultural sciencesagriculture, forestry, and fisheriesagricultureagricultural sciencesanimal and dairy sciencedomestic animalsanimal husbandryagricultural sciencesagriculture, forestry, and fisheriesforestrynatural sciencesmathematicsapplied mathematicsmathematical model Programme(s) FP2-STEP - Two specific research and technological development programmes (EEC) in the field of the environment STEP/EPOCH - STEP -, 1989-1992 Topic(s) Data not available Call for proposal Data not available Funding Scheme CSC - Cost-sharing contracts Coordinator University of Aberdeen EU contribution No data Address 581 King Street AB9 1FX Aberdeen United Kingdom See on map Total cost No data Participants (5) Sort alphabetically Sort by EU Contribution Expand all Collapse all Aristotle University of Thessaloniki Greece EU contribution No data Address University Campus 54006 Thessaloniki See on map Total cost No data MACAULAY LAND USE RESEARCH INSTITUTE United Kingdom EU contribution No data Address Craigiebuckler AB15 8QH ABERDEEN See on map Total cost No data Teagasc, Agriculture and Food Development Authority Ireland EU contribution No data Address Malahide Road 17 Dublin See on map Total cost No data Università degli Studi di Bologna Italy EU contribution No data Address Via Filippo Re 6 40126 Bologna See on map Total cost No data Universität Hannover Germany EU contribution No data Address Am Steinberg 3 31157 Sarstedt See on map Total cost No data