01498nam a2200373 a 450000100080000000500110000800800410001902000180006010000170007824500700009526000230016530000110018852006650019965000120086465000130087665000090088965000210089865000100091965000100092965000110093965000130095065000160096365000100097965000160098965000110100565000160101665000170103265000100104965300120105965300100107165300130108165300110109465300190110512040682010-09-15       1996    bl uuuu      00u1 u    #d  a971-22-0068-X1 aROGER, P. A.  aBiology and management of the floodwater ecosystem in ricefields.  aManila: IRRIc1996  a250 p.  aThe autor focuses on management practices that maintain soil fertility, preserve or even improve the floodwater environment, and provide opportunities for diversifying sources of food and income beyond rice monoculture. Through his extensive review of the literature of this book, which contains nearly 600 references published over the last 65 years, he has synthesized the major ecological and agronomic aspects of the biology of the floodwater environment. An appendix provides the details on various methods for conducting ecological studies in ricefields and evaluates the different methods in relation to their suitability for different kinds of studies.  abiomass  anitrogen  arice  aAdubação Verde  aÁgua  aArroz  aAzolla  aBiologia  aEcossistema  aFauna  aInundação  aManejo  aNitrogênio  aOryza Sativa  aPeixe  aAquatic  aGreen  aInundado  aManure  aPhotosynthetic