00488    a2200145   4500020001500000082001700015100002400032245008200056260004700138300001800185650005700203650001700260650004000277700002500317  a0851992188  a631.422bCAR  aBergstrom, L. eed.  aCarbon and nutrient dynamics in natural and agricultural tropical ecosystems   aWallingfordbCAB Internationalc1998g1998  ax,319p.c24cm  aSpecific techniques; apparatus, equipment, materials  aSoil science  aSoil fertility, acidity, alkalinity  akirchmann, H. eed.