s:272:"%T Agroforestry for acid soils in the humid tropics: managing tree-soil-crop interactions %A Van, Noordwijk.M. %A Lusiana, B. %A Hairiah, D.K. %A Utami, R.S. %A Suprayogo, D. %A Widianto %A Sitompul, S.M. %A Sunaryo, D. %A Mulia, R.M. %A Cadisch, G. ";