00342nam a22001217a 4500003000400000005001700004008004100021020001500062082001500077100002500092245007500117260002800192OSt20140519110425.0140519b        xxu||||| |||| 00| 0 eng d  a0851996701  a631.4   P3  aHartmink, Alfred. E.  aSoil fertility decline in the tropics with case studies on plantations  aWallingfordbCABIc2003