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Vitousek, P.M; Naylor, R; Crews, T; David, M.B; Drinkwater, L.E; Holland, E; Johnes, P.J; Katzenberger, J; Martinelli, L.A; Matson, P.A; Nziguheba, G; Ojima, D; Palm, C.A; Robertson, G.P; Sanchez, P.A; Townsend, A.R; Zhang, F.S
Science (American Association for the Advancement of Science), 06/2009, Letnik: 324, Številka: 5934Journal Article
Nutrient additions to intensive agricultural systems range from inadequate to excessive--and both extremes have substantial human and environmental costs.
