Linking Farm and Market Models to Analyse the Effects of the EU Nitrate Directive for the Dutch Agricultural Sector

This paper presents a modeling system that can be used to analyze the trade off between economy and environment. It takes into account manure policy, farm structure and manure surpluses at farm level as well as the economic effects of manure surpluses at market level. The modeling system consists of two models that are linked to each other by at the one-hand manure prices and distribution of manure over different destinations and at the other hand changes in agricultural and total manure production. One model is the so-called Manure and Ammonia Model (MAM). This model calculates manure surpluses and deficits at the farm level and distribution of manure to own farm, own region, other regions, export abroad and processing at the regional level. Moreover, MAM also calculates ammonia emissions coming from different sources. The second model is a market model that includes the most important agricultural markets. The models are calibrated for 2002. The modeling system is tested to analyze the effects of sharpened manure policies until 2006.farm models, market models, manure, economy, policy, Agricultural and Food Policy,

Gasvormige stikstofverliezen uit stal en opslag: Verschillen in berekeningsmethoden

The Netherlands Environmental Assessment Agency of the National Institute of Public Health and the Environment (MNP-RIVM) publishes an Environmental Balance Sheet each year in accordance with the Environmental Management Act. Calculations using the Manure and Ammonia Model of ammonia emissions and other gaseous nitrogen losses form the basis of the figures contained in the publication. The large differences observed between this calculation and comparable calculations by Statistics Netherlands form the motivation for an analysis of the differences. This insight, supplemented with insight into the comparison of calculated and measured mineral levels in the manure, gave rise to a discussion on which starting points and calculation method were the most suitable as a basis for the Environmental Balance Sheet. Ingevolge de Wet Milieubeheer brengt het Milieu- en Natuurplanbureau van het RIVM (MNP-RIVM) jaarlijks een Milieubalans uit. Berekeningen met het Mest- en Ammoniakmodel van ammoniakemissie en andere gasvormige stikstofverliezen liggen ten grondslag aan de cijfers in de publicatie. De geconstateerde grote verschillen tussen deze berekening en vergelijkbare berekeningen van het CBS vormen de aanleiding naar een analyse van de verschillen. Dit inzicht, aangevuld met inzicht in de vergelijking van berekende en gemeten mineralengehalten in de mest, was de basis voor een discussie over welke uitgangspunten en berekeningsmethode het meest geschikt zijn als basis voor de Milieubalans

Linking Farm and Market Models to Analyse the Effects of the EU Nitrate Directive for the Dutch Agricultural Sector

This paper presents a modeling system that can be used to analyze the trade off between economy and environment. It takes into account manure policy, farm structure and manure surpluses at farm level as well as the economic effects of manure surpluses at market level. The modeling system consists of two models that are linked to each other by at the one-hand manure prices and distribution of manure over different destinations and at the other hand changes in agricultural and total manure production. One model is the so-called Manure and Ammonia Model (MAM). This model calculates manure surpluses and deficits at the farm level and distribution of manure to own farm, own region, other regions, export abroad and processing at the regional level. Moreover, MAM also calculates ammonia emissions coming from different sources. The second model is a market model that includes the most important agricultural markets. The models are calibrated for 2002. The modeling system is tested to analyze the effects of sharpened manure policies until 2006