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

• Published in: Agronomy (Basel) Vol. 7; no. 4; p. 73
• Main Authors: Machet, Jean-Marie, Dubrulle, Pascal, Damay, Nathalie, Duval, Rémy, Julien, Jean-Luc, Recous, Sylvie
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 14.11.2017; MDPI
• Subjects: Agricultural management; Agricultural sciences; Cereals; Computer design; Cropping systems; Crops; Decision making; decision support tool; Dynamic models; Environmental impact; Environmental management; Environmental Sciences; fertilisation; Fertilization; field crops; Global Changes; Life Sciences; Modularity; N balance; Nitrogen; Organic soils; Soil dynamics; Sustainable agriculture; Vegetables; annual crops; Decision-making tool; OAD; Nitrogen; Fertilisation
• ISSN: 2073-4395; 2073-4395
• DOI: 10.3390/agronomy7040073

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.