 Complete the following phrase:  A number of factors contributed to Portugals poor agricultural performance. First, the level of investment in agriculture was traditionally very low. The number of tractors and the quantity of fertilizer used per unit area was one-third the European Community average in the mid-1980s. Second, farms in the north were small and fragmented; half of them were less than one hectare in size, and 86 percent less than five hectares. Third, the collective farms set up in the south after the 197475 expropriations due to the 