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Fig. 4


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Proportions de N (a, b, c), P (e, f, g) et K (h, i, j) totaux apportées sous différentes formes en milieu urbain (a, e, h), semi-urbain (b, f, i) et rural (c, g, j).

Proportion of total N (a, b, c), P (e, f, g) and K (h, i, j) applied in urban (a, e, h), semi-urban (b, f, i) and rural (c, g, j) areas.

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