Agricultural data for Life Cycle Assessments
نویسندگان
چکیده
On a world scale, a net transport of P to the oceans occurs, maintained by weathering of minerals and by erosion. The soil plays a different role regarding phosphorus in different agricultural systems. Without adding fertilisers, a soil can supply P for a limited time, by weathering or by mineralisation of indigenous organic matter. When a higher productivity is aimed at, fertilisers have to be added. In general, more P has to be added than is taken off by the crop to compensate for P becoming less available for plant uptake. In regions with a surplus of animal manure, P contents of the soil can become very high, creating problems due to eutrophication of surface waters.
منابع مشابه
Use of Monte Carlo analysis to characterize nitrogen fluxes in agroecosystems.
Intensive agricultural systems are largely responsible for the increase in global reactive nitrogen compounds, which are associated with significant environmental impacts. The nitrogen cycle in agricultural systems is complex and highly variable, which complicates characterization in environmental assessments. Appropriately representing nitrogen inputs into an ecosystem is essential to better u...
متن کاملIII Agricultural data for life cycle assessments
An inventory for Life Cycle Analysis of agricultural products must address questions of representatively and coherence of models. This paper discusses the possibilities of modelling the input and production of typical farms to establish inventories that are consistent with higher level statistical information. Energy use has been modelled for typical Danish farms and compared with the national ...
متن کاملAssessment of the Pattern of Energy Consumption in Dryland Rape Production and its Environmental Effects In Ilam province
The use of agricultural machinery, fuel, fertilizers, and pesticides render agriculture dependent on energy and have negative environmental effects on water, air and land. Therefore, it is necessary to study the process of energy consumption for producting the different products and take the necessary measures to increase the efficiency and decrease the environmental effect of these inputs. In ...
متن کاملLife Cycle Based Evaluation of Environmental and Economic Impacts of Agricultural Productions in the Mediterranean Area
In recent years, there has been an increasing interest in Life Cycle Assessment (LCA) applied to estimate the cradle-to-grave environmental impact of agricultural products or processes. Furthermore, including in the analysis an economic evaluation, from the perspective of an integrated life cycle approach, appears nowadays as a fundamental improvement. In particular, Life Cycle Costing (LCC), i...
متن کاملEvaluation of the environmental impact of broiler chicken production by industrial and traditional methods using the Life Cycle Assessment
Poultry meat with a high share in the food consumption is one of the most basic products for supplying protein to households. Due to the high amount of pollutants in this part, the environmental impact of the production of this product is necessary. In the present study, the environmental impact of broiler chicken production in both industrial and traditional breeding methods were evaluated ...
متن کامل