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European Review of Agricultural Economics vol. 30 no. 4 © Oxford University Press and Foundation for the European Review of Agricultural Economics 2003; all rights reserved

A dynamic model of on-farm integrated nitrogen management

Alban Thomas

INRA-LEERNA, University of Toulouse, Toulouse, France

Corresponding author: Alban Thomas, INRA-LEERNA, Université des Sciences Sociales de Toulouse, 21 Allée de Brienne, 31000 Toulouse, France. E-mail: thomas{at}toulouse.inra.fr

Received April 2002; Revision received September 2003.

Summary

We present a dynamic model of on-farm nitrogen fertilisation management that allows for a structural relationship between land allocation decisions and nitrogen carry-over from previous crops. We derive conditions for efficient inter-temporal nitrogen management in a multi-crop setting, and suggest an empirical testing procedure for crop rotation patterns based on farm-level data. Nitrogen carry-over indexes and production parameters are estimated by the Generalised Method of Moments using panel data for a sample of French farmers.

Keywords: agricultural production, nitrogen management, crop rotation, Generalised Method of Moments (GMM)

JEL classification: C61, Q12, Q15


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