Vol. 39 (1989-1992): Recent submissions

Now showing items 21-22 of 22

  • Estimates of the numbers and areas of acidic lakes in Nova Scotia. 

    Underwood, J. K.; Schwartz, P. Y. (Dalhousie Printing Centre, 1990-03)
    There are 6674 lakes larger than 1 hectare in Nova Scotia covering an area of 2255 km<sup>2</sup>. Geological and pH isopleth maps were consulted to estimate acidified and acid sensitive lakes. Assuming that granitic or ...

  • A survey of Infestation of crops by Striga spp in Benin, Nigeria and Togo 

    Parkinson, V. O. (Dalhousie Printing Centre, 1990-03)
    The incidence of Striga spp. on agricultural crops in Benin, Nigeria and Togo between latitudes 4° N and 13° 30' N was surveyed in 1964 and 1965. The survey covered 463 fields in Nigeria, 112 in Benin and 55 in Togo. It ...