| 1. |
|
|
| 2. |
- Collentine, Dennis, et al.
(författare)
-
Consequences of future nutrient load scenarios on multiple benefits of agricultural production
- 2013
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Nutrient load rates to the Baltic Sea need to be reduced. Agricultural land is regarded as the most significant contributor to the loads, and measures to reduce losses of nitrogen (N) and phosphorus (P) loads have been proposed, both for the near and far future. Agricultural production was to a large extent considered in these scenarios, whereas effects on other ecosystem services were not evaluated. The question to be answered by this report is whether the measures adopted to reduce N and P losses improve or impair multiple benefits of agriculture. The question is answered for a specific catchment (Svärtaån) located in Sweden, but the method is thoroughly described to provide a potential method to also evaluate other catchments. This work was performed as a part of the Baltic Compass project (2013). The answer to the main question of whether the measures adopted to reduce N and P losses from agricultural fields improved or impaired multiple benefits of agriculture, seems to be that they improved. Most of the BAP measures had a positive influence on most of the MB-categories, the clearest exception being liming in tile drains which only improved the cost effectiveness. Except for water protection, the biosecurity MB-category was positively influenced by the most measures (6 out of 9) and with soil quality the next highest (5 out of 9). It is less clear how the absolute values evaluated for the MB index, can be compared among MB-categories. Among the BAP-measures, structural liming was the most positive measure (summing up the indices of all MB-categories), followed by buffer-zones and spring cultivation the next, although the cost effectiveness of these latter measures was evaluated to decrease. In the “unavoidable” future (Future scenarios) GHG emissions strongly increased. The only measure that mitigated that effect was reduced N fertilisation, providing more arguments for applying reduced fertilisation than only to reduce leaching.
|
|
| 3. |
|
|
| 4. |
|
|
| 5. |
|
|
| 6. |
|
|
| 7. |
|
|
| 8. |
- Collentine, Dennis, et al.
(författare)
-
Evaluating the effect of climate variation on the cost efficiency of a crop permit policy in Southern Sweden
- 2013
-
Ingår i: Journal of Water and Climate. - : IWA Publishing. - 2040-2244 .- 2408-9354. ; 4:2, s. 110-117
-
Tidskriftsartikel (refereegranskat)abstract
- Current international agreements call for a significant reduction of nitrogen loads to the Baltic Sea. New measures to reduce nitrogen loads from the agricultural sector and an increased focus on cost efficiency will be needed to meet reduction targets. For policy design and evaluation it is important to understand the impact of weather on the efficiency of abatement measures. One new proposed policy is the use of crop permits based on weather normalized average leaching. This paper describes the use of the Spearman method to determine the efficiency of this policy with annual weather variation. The conclusion is that the values of the Spearman correlation coefficients in the study indicate that using average leaching for the individual crops on specific soil types for calculating crop permit requirements is an efficient policy. The Spearman method is demonstrated to be a simple useful tool for evaluating the impact of weather and is recommended for use in new studies.
|
|
| 9. |
|
|
| 10. |
- Collentine, Dennis, et al.
(författare)
-
Evaluating the Environmental and Economic Impact of Taxes on Pesticides: Case Study of a Tax on Toxicity
- 2011
-
Konferensbidrag (refereegranskat)abstract
- Regulation of pesticides has often followed a command and control approach. However, economic instruments allow for environmental goals to be used for targeting as well as provide users (farmers) with flexibility in their response. The primary environmental effects of concern from the use of plant pesticides are related to the toxic effects on non-targeted organisms in environmental media. This paper describes a methodology for ex ante evaluation of policy alternatives for reducing the impact on the aquatic environment from pesticide use.The proposed methodology consists of several components. It uses the Pesticide Toxicity Index (PTI) for defining an environmental goal and for evaluation of the environmental effect of policy alternatives, a field based model MACRO-DB for describing the impact of crop management programs and agricultural land use on concentrations of active compounds from pesticide use and the use of economic modelling to determine the effect on farm income from alternative tax schemes. The paper presents an application of this method using empirical data from a small agricultural catchment in Southern Sweden and compares the economic and environmental effects of a differentiated tax on the most toxic class of pesticides and a flat tax on all pesticides. On average the costs of reducing environmental impacts by one unit of PTI were estimated to be €1 009 for the flat tax and €71,5 for the differentiated tax.
|
|
