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| Iho, Antti; Laukkanen, Marita. |
| This paper puts forward a model of the role of phosphorus in crop production, soil phosphorus dynamics and phosphorus loading that integrates the salient economic and ecological features of agricultural phosphorus management. The model accounts for the links between phosphorus fertilization, crop yield, accumulation of soil phosphorus reserves, and phosphorus loading. It can be used to guide precision phosphorus management and erosion control as means to mitigate agricultural loading. Using a parameterization for cereal production in southern Finland, the model is solved numerically to analyze the intertemporally optimal combination of fertilization and erosion and the associated soil phosphorus development. The optimal fertilizer application rate changes... |
| Tipo: Report |
Palavras-chave: Air and water emissions. |
| Ano: 2009 |
URL: http://orgprints.org/16449/1/Discussion.pdf |
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| Helin, Janne; Laukkanen, Marita; Koikkalainen, Kauko. |
| Designing efficient agri-environmental policies for agricultural nutrient load reductions calls for information on the costs of emission reduction measures. This study develops an empirical framework for estimating abatement costs for nutrient loading from agricultural land. Nitrogen abatement costs and the phosphorus load reductions associated with nitrogen abatement are derived for crop farming in southern Finland. The model is used to evaluate the effect of the Common Agricultural Policy reform currently underway on nutrient abatement costs. Results indicate that an efficiency designed policy aimed at a 50 % reducton in agricultural nitrogen load would cost 25 to 28 million euro, or 1995 to 2197 euro per farm. |
| Tipo: Report |
Palavras-chave: Air and water emissions. |
| Ano: 2006 |
URL: http://orgprints.org/11137/1/DPapers.pdf |
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| Kuosmanen, Timo; Laukkanen, Marita. |
| Many environmental problems involve the transformation of multiple harmful substances into one or more damage agents much in the same way as a firm transforms inputs into outputs. Yet environmental management differs from a firm's production in one important respect: while a firm seeks efficient input allocation to maximize profit, an environmental planner allocates abatement efforts to render the production of damage agents as inefficient as possible. We characterize a solution to the hmultiple pollutants problem and show that the optimal policy is often a corner solution, in which abatement is focused on a single pollutant. Corner solutions may arise even in well-behaved problems with concave production functions and convex damage and cost functions.... |
| Tipo: Report |
Palavras-chave: Environmental aspects. |
| Ano: 2009 |
URL: http://orgprints.org/16452/1/discuss5.pdf |
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| Helin, Janne; Laukkanen, Marita; Koikkalainen, Kauko. |
| Designing efficient agri-environmental policies for agricultural nutrient load reductions calls for information on the costs of emission reduction measures. This study develops an empirical framework for estimating abatement costs for nutrient loading from agricultural land. Nitrogen abatement costs and the phosphorus load reductions associated with nitrogen abatement are derived for crop farming in south-western Finland. The model is used to evaluate the effect of the Common Agricultural Policy reform currently underway on nutrient abatement costs. Results indicate that an efficiently designed policy aimed at a 50% reduction in agricultural nitrogen load would cost € 48 to € 35 million, or € 3756 to € 2752 per farm. |
| Tipo: Journal paper |
Palavras-chave: Air and water emissions. |
| Ano: 2006 |
URL: http://orgprints.org/16761/1/helin.pdf |
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