Fig. 3
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Quantités annuelles moyennes (et écart-type) de N, P et K apportées par ha de maraîchage sous forme organique ou minérale (a) et quantité de N apportée par ha et par cycle pour quelques cultures (b) en milieu urbain, semi-urbain et rural.
Annual quantity of mineral or organic N, P and K applied (a) and quantity of N applied per crop (b) in urban, semi-urban and rural areas.
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