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Showing items 1 through 9 of 2.
  1. Library Resource
    Conference Papers & Reports
    December, 1988
    Ethiopia, Africa, Eastern Africa

    Presents the results of investigations on the relative distribution of the various phosphorus forms, fixing capacity and status of some Ethiopian highland Vertisols.

  2. Library Resource
    Conference Papers & Reports
    December, 1988
    Ethiopia, Africa, Eastern Africa

    Outlines an economic evaluation of an improved surface drainage technology, using the broad-bed-maker (BBM) on-farm in four different vertisol areas of the Ethiopian highlands. Presents data on crops and number of areas covered for the on-farm drainage technology, on cost structure of the BBM, and on human and oxen labour input in traditional seed covering and the construction of the BBM.

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