01439naa a2200217 a 450000100080000000500110000800800410001910000230006024500540008326000090013730000150014652007850016165000160094665000250096265000130098765000160100065000310101665000130104765300110106077301500107110992362018-03-13       1984    bl uuuu     u00u1 u    #d1 aALVES, E. R. de A.  aThe challenge of agricultural research in Brazil.  c1984  ap. 277-307  aHistorical experiente shows distinct agricultura1 stages in the process of economic dwelopment. During the initial stage, production is almost exclusively limited to food and fibers. Industrial production is in its initial phase, and the service sector is not important. Technology is based on the utilization of land and labor; investments in physical and human capital are inexpressive and illiteracy is high. Natural factors determine demographic growth. These are mainly the availability of food and the occurence of diseases. Birth rates and mortality are high, while family planning is not practiced. The population is predominantly young and rural, at equilibrium as determined by the availability of food, or increasing at a fast rate. Per capita income is relatively low.  aagriculture  aeconomic development  aresearch  aAgricultura  aDesenvolvimento Econômico  aPesquisa  aBrasil  tIn: YEGANIANTZ, L. (Ed.). Brazilian agriculture and agricultural research. Brasília, DF: EMBRAPA-DDT, 1984. 307 p. (EMBRAPA-DEP. Documentos, 9).