00542nam a2200181 a 450000100080000000500110000800800410001910000160006024500670007626000290014330000270017250000510019965000170025065000190026765300260028665300280031270000200034018885982011-05-20       2003    bl uuuu      00u1 u    #d1 aSCHROTH, G.  aTrees, crops and soil fertilitybconcepts and research methods  aWallingford : CABIc2003  a437 p.cill. ;  25 cm.  aIncludes bibliographical references and index.  aagroforestry  asoil fertility  aAgroforestry Research  aSoil fertility Research1 aSINCLAIR, F. L.