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A Dynamic Decision-Making Tool for Calculating the Optimal Rates of N Application for 40 Annual Crops While Minimising the Residual Level of Mineral N at Harvest

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AGROIMPACT, INRA, 180 rue Pierre-Gilles de Gennes, Barenton-Bugny, 02000 Laon, France
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LDAR, 180 rue Pierre-Gilles de Gennes, Barenton-Bugny, 02000 Laon, France
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ITB, 45 rue de Naples, 75008 Paris, France
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FARE Laboratory, INRA, URCA, 2, Esplanade R. Garros, 51100 Reims, France
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Author to whom correspondence should be addressed.
Agronomy 2017, 7(4), 73; https://doi.org/10.3390/agronomy7040073
Received: 20 July 2017 / Revised: 16 October 2017 / Accepted: 7 November 2017 / Published: 14 November 2017
Adequate nitrogen (N) fertilisation is an important component of sustainable management in agricultural systems because it reduces the environmental impacts of agriculture. However, taking into account the varied sources of soil N remains a challenge, and farmers require robust decision-making tools to manage increasingly diverse growing conditions. To address these issues, we present the AzoFert® decision support system for farmers and extension services. This tool is capable of providing N recommendations at the field scale for 40 main field crops. It is based on a full inorganic N balance sheet and integrates the dynamic modelling of N supply from soil and various organic sources. Because of the choice of formalisms and parameters and the structure and modularity of the computer design, the tool is easily adaptable to new crops and cropping systems. We illustrate the application of Azofert® through a range of N fertilisation experiments conducted on cereals, sugar beet and vegetables in France. View Full-Text
Keywords: decision support tool; fertilisation; field crops; N balance; nitrogen decision support tool; fertilisation; field crops; N balance; nitrogen
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MDPI and ACS Style

Machet, J.-M.; Dubrulle, P.; Damay, N.; Duval, R.; Julien, J.-L.; Recous, S. A Dynamic Decision-Making Tool for Calculating the Optimal Rates of N Application for 40 Annual Crops While Minimising the Residual Level of Mineral N at Harvest. Agronomy 2017, 7, 73.

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