00701nam a2200217 a 450000100080000000500110000800800410001910000180006024501170007826000360019530000100023150001040024152000470034565000090039265000100040165000130041165000090042465000100043365300230044370000170046619323922023-07-05       1982    bl uuuu     u0uu1 u    #d1 aSHARMA, P. N.  aResearch strategy for the improvement of land and water resources of the semi-arid tropics of North-East Brazil.  aPetrolina: EMBRAPA-CPATSAc1982  a19 p.  aTrabalho apresentado no 1º Simpósio Brasileiro do Trópico Sem-Árido, Olinda,PE, agosto de 1982.  aClimate; Soils; Socio-economic conditions.  aSoil  aÁgua  aPesquisa  aSolo  aTerra  aRecursos hídricos1 aPORTO, E. R.