Fertilization in pastoral and Pinus radiata D. Don silvopastoral systems developed in forest and agronomic soils of Northwest Spain

▶ The use of the sludge as fertilizer increases productivity at short term in forest soils. ▶ Preserves soil fertility compared with mineral fertilizer at medium term in agronomic soils. ▶ Soil and pasture production and quality were better under agronomic soils than under forest soils. ▶ Organic fertilizer sustains better soil fertility than mineral fertilizer.